/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 15:55:11,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 15:55:11,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 15:55:11,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 15:55:11,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 15:55:11,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 15:55:11,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 15:55:11,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 15:55:11,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 15:55:11,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 15:55:11,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 15:55:11,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 15:55:11,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 15:55:11,804 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 15:55:11,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 15:55:11,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 15:55:11,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 15:55:11,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 15:55:11,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 15:55:11,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 15:55:11,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 15:55:11,806 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 15:55:11,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 15:55:11,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 15:55:11,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 15:55:11,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 15:55:11,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 15:55:11,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 15:55:11,809 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 15:55:11,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 15:55:11,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:55:11,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 15:55:11,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 15:55:11,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 15:55:11,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 15:55:11,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 15:55:11,810 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 15:55:11,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 15:55:11,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 15:55:12,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 15:55:12,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 15:55:12,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 15:55:12,061 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 15:55:12,062 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 15:55:12,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2022-03-15 15:55:12,064 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2022-03-15 15:55:12,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 15:55:12,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 15:55:12,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 15:55:12,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 15:55:12,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 15:55:12,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,126 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 15:55:12,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 15:55:12,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 15:55:12,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 15:55:12,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 15:55:12,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 15:55:12,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 15:55:12,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 15:55:12,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 15:55:12,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/1) ... [2022-03-15 15:55:12,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:55:12,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:12,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 15:55:12,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 15:55:12,229 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 15:55:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 15:55:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 15:55:12,229 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 15:55:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 15:55:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 15:55:12,230 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 15:55:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 15:55:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 15:55:12,231 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 15:55:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 15:55:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 15:55:12,232 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 15:55:12,283 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 15:55:12,284 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 15:55:12,436 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 15:55:12,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 15:55:12,524 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-15 15:55:12,526 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:55:12 BoogieIcfgContainer [2022-03-15 15:55:12,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 15:55:12,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 15:55:12,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 15:55:12,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 15:55:12,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:55:12" (1/2) ... [2022-03-15 15:55:12,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38242efd and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 03:55:12, skipping insertion in model container [2022-03-15 15:55:12,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:55:12" (2/2) ... [2022-03-15 15:55:12,557 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2022-03-15 15:55:12,561 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 15:55:12,561 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 15:55:12,562 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 15:55:12,562 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 15:55:12,645 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 15:55:12,702 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 15:55:12,711 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 15:55:12,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 15:55:12,725 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2022-03-15 15:55:12,762 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:55:12,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:12,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:12,774 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash -29429742, now seen corresponding path program 1 times [2022-03-15 15:55:12,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:12,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789463474] [2022-03-15 15:55:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:13,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:13,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789463474] [2022-03-15 15:55:13,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789463474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:13,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:13,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:13,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683161633] [2022-03-15 15:55:13,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:13,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:13,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:13,299 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:13,615 INFO L93 Difference]: Finished difference Result 362 states and 1164 transitions. [2022-03-15 15:55:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 15:55:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:55:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:13,639 INFO L225 Difference]: With dead ends: 362 [2022-03-15 15:55:13,639 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 15:55:13,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:55:13,646 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:13,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 15:55:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 126. [2022-03-15 15:55:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2022-03-15 15:55:13,706 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2022-03-15 15:55:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:13,707 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2022-03-15 15:55:13,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2022-03-15 15:55:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:55:13,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:13,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:13,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 15:55:13,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1669447950, now seen corresponding path program 2 times [2022-03-15 15:55:13,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:13,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445738403] [2022-03-15 15:55:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:13,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:13,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445738403] [2022-03-15 15:55:13,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445738403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:13,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:13,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:13,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555961919] [2022-03-15 15:55:13,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:13,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:13,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:13,846 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:14,040 INFO L93 Difference]: Finished difference Result 285 states and 894 transitions. [2022-03-15 15:55:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:55:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:55:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:14,045 INFO L225 Difference]: With dead ends: 285 [2022-03-15 15:55:14,046 INFO L226 Difference]: Without dead ends: 270 [2022-03-15 15:55:14,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:55:14,055 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:14,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-15 15:55:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 132. [2022-03-15 15:55:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2022-03-15 15:55:14,069 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2022-03-15 15:55:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:14,070 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2022-03-15 15:55:14,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2022-03-15 15:55:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:55:14,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:14,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:14,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 15:55:14,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash 332003462, now seen corresponding path program 3 times [2022-03-15 15:55:14,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:14,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553259077] [2022-03-15 15:55:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:14,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:14,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553259077] [2022-03-15 15:55:14,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553259077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:14,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:14,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:14,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324776060] [2022-03-15 15:55:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:14,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:14,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:14,265 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:14,515 INFO L93 Difference]: Finished difference Result 270 states and 805 transitions. [2022-03-15 15:55:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:55:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:55:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:14,517 INFO L225 Difference]: With dead ends: 270 [2022-03-15 15:55:14,517 INFO L226 Difference]: Without dead ends: 255 [2022-03-15 15:55:14,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:55:14,519 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:14,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-15 15:55:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 140. [2022-03-15 15:55:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-03-15 15:55:14,539 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-03-15 15:55:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:14,540 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-03-15 15:55:14,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-03-15 15:55:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:55:14,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:14,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:14,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 15:55:14,546 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash -198832182, now seen corresponding path program 4 times [2022-03-15 15:55:14,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:14,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654221259] [2022-03-15 15:55:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:14,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:14,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654221259] [2022-03-15 15:55:14,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654221259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:14,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:14,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:14,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539726571] [2022-03-15 15:55:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:14,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:14,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:14,721 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:14,957 INFO L93 Difference]: Finished difference Result 263 states and 775 transitions. [2022-03-15 15:55:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:55:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:55:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:14,959 INFO L225 Difference]: With dead ends: 263 [2022-03-15 15:55:14,959 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 15:55:14,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:55:14,960 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:14,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 15:55:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2022-03-15 15:55:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-03-15 15:55:14,969 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-03-15 15:55:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:14,970 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-03-15 15:55:14,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-03-15 15:55:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:55:14,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:14,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:14,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 15:55:14,971 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:14,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:14,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1457604362, now seen corresponding path program 5 times [2022-03-15 15:55:14,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:14,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132803233] [2022-03-15 15:55:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:14,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:15,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132803233] [2022-03-15 15:55:15,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132803233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:15,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:15,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:15,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627807055] [2022-03-15 15:55:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:15,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:15,102 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:15,326 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2022-03-15 15:55:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:55:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:55:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:15,328 INFO L225 Difference]: With dead ends: 229 [2022-03-15 15:55:15,328 INFO L226 Difference]: Without dead ends: 214 [2022-03-15 15:55:15,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:55:15,330 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 31 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-15 15:55:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2022-03-15 15:55:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-03-15 15:55:15,338 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-03-15 15:55:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:15,338 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-03-15 15:55:15,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-03-15 15:55:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:55:15,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:15,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:15,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 15:55:15,340 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1842890102, now seen corresponding path program 6 times [2022-03-15 15:55:15,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:15,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146386185] [2022-03-15 15:55:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:15,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146386185] [2022-03-15 15:55:15,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146386185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:15,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:15,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:15,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137925800] [2022-03-15 15:55:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:15,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:15,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:15,487 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:15,792 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2022-03-15 15:55:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:55:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:55:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:15,795 INFO L225 Difference]: With dead ends: 336 [2022-03-15 15:55:15,795 INFO L226 Difference]: Without dead ends: 321 [2022-03-15 15:55:15,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:55:15,796 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:15,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-15 15:55:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2022-03-15 15:55:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-03-15 15:55:15,804 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-03-15 15:55:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:15,804 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-03-15 15:55:15,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-03-15 15:55:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:55:15,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:15,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:15,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 15:55:15,805 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1236732740, now seen corresponding path program 1 times [2022-03-15 15:55:15,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:15,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199940145] [2022-03-15 15:55:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:15,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199940145] [2022-03-15 15:55:15,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199940145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:15,823 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:15,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:55:15,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081103473] [2022-03-15 15:55:15,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:15,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:55:15,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:15,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:55:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:55:15,824 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:15,852 INFO L93 Difference]: Finished difference Result 163 states and 538 transitions. [2022-03-15 15:55:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:55:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:55:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:15,854 INFO L225 Difference]: With dead ends: 163 [2022-03-15 15:55:15,854 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 15:55:15,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:55:15,855 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:15,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 15:55:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-15 15:55:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.3209876543209877) internal successors, (538), 162 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 538 transitions. [2022-03-15 15:55:15,861 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 538 transitions. Word has length 15 [2022-03-15 15:55:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:15,861 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 538 transitions. [2022-03-15 15:55:15,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 538 transitions. [2022-03-15 15:55:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:55:15,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:15,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:15,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 15:55:15,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1228810757, now seen corresponding path program 1 times [2022-03-15 15:55:15,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:15,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221350145] [2022-03-15 15:55:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:15,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221350145] [2022-03-15 15:55:15,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221350145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:15,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:15,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:55:15,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588936957] [2022-03-15 15:55:15,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:15,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:55:15,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:55:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:55:15,880 INFO L87 Difference]: Start difference. First operand 163 states and 538 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:15,911 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2022-03-15 15:55:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:55:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:55:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:15,913 INFO L225 Difference]: With dead ends: 192 [2022-03-15 15:55:15,913 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 15:55:15,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:55:15,914 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:15,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 15:55:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-03-15 15:55:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2022-03-15 15:55:15,921 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2022-03-15 15:55:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:15,921 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2022-03-15 15:55:15,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2022-03-15 15:55:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:55:15,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:15,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:15,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 15:55:15,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:15,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1075245774, now seen corresponding path program 1 times [2022-03-15 15:55:15,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:15,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3242052] [2022-03-15 15:55:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:15,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:15,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3242052] [2022-03-15 15:55:15,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3242052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:15,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:15,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 15:55:15,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780343489] [2022-03-15 15:55:15,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:15,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:55:15,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:15,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:55:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:55:15,968 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:15,996 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2022-03-15 15:55:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:55:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:55:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:15,998 INFO L225 Difference]: With dead ends: 223 [2022-03-15 15:55:15,998 INFO L226 Difference]: Without dead ends: 223 [2022-03-15 15:55:15,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:55:16,001 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:16,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-15 15:55:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-03-15 15:55:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2022-03-15 15:55:16,010 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2022-03-15 15:55:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:16,010 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2022-03-15 15:55:16,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2022-03-15 15:55:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:16,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:16,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:16,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 15:55:16,012 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -8420014, now seen corresponding path program 1 times [2022-03-15 15:55:16,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:16,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127160357] [2022-03-15 15:55:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:16,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:16,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127160357] [2022-03-15 15:55:16,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127160357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:16,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:16,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:16,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083001943] [2022-03-15 15:55:16,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:16,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:16,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:16,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:16,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:16,078 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:16,183 INFO L93 Difference]: Finished difference Result 571 states and 1745 transitions. [2022-03-15 15:55:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 15:55:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:16,186 INFO L225 Difference]: With dead ends: 571 [2022-03-15 15:55:16,186 INFO L226 Difference]: Without dead ends: 495 [2022-03-15 15:55:16,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:55:16,187 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:16,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 28 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-15 15:55:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2022-03-15 15:55:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2672413793103448) internal successors, (758), 232 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 758 transitions. [2022-03-15 15:55:16,198 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 758 transitions. Word has length 16 [2022-03-15 15:55:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:16,201 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 758 transitions. [2022-03-15 15:55:16,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 758 transitions. [2022-03-15 15:55:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:16,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:16,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:16,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-15 15:55:16,202 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:16,203 INFO L85 PathProgramCache]: Analyzing trace with hash 245083442, now seen corresponding path program 1 times [2022-03-15 15:55:16,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:16,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303248258] [2022-03-15 15:55:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:16,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:16,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:16,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303248258] [2022-03-15 15:55:16,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303248258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:16,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:16,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:16,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478280262] [2022-03-15 15:55:16,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:16,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:16,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:16,263 INFO L87 Difference]: Start difference. First operand 233 states and 758 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:16,344 INFO L93 Difference]: Finished difference Result 403 states and 1190 transitions. [2022-03-15 15:55:16,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:55:16,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:16,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:16,346 INFO L225 Difference]: With dead ends: 403 [2022-03-15 15:55:16,346 INFO L226 Difference]: Without dead ends: 355 [2022-03-15 15:55:16,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:55:16,348 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:16,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-15 15:55:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 233. [2022-03-15 15:55:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2022-03-15 15:55:16,358 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2022-03-15 15:55:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:16,358 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2022-03-15 15:55:16,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2022-03-15 15:55:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:16,359 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:16,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:16,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-15 15:55:16,359 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1080130578, now seen corresponding path program 2 times [2022-03-15 15:55:16,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:16,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419211302] [2022-03-15 15:55:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:16,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:16,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:16,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419211302] [2022-03-15 15:55:16,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419211302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:16,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:16,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:16,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589567162] [2022-03-15 15:55:16,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:16,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:16,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:16,417 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:16,522 INFO L93 Difference]: Finished difference Result 500 states and 1476 transitions. [2022-03-15 15:55:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 15:55:16,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:16,526 INFO L225 Difference]: With dead ends: 500 [2022-03-15 15:55:16,526 INFO L226 Difference]: Without dead ends: 460 [2022-03-15 15:55:16,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:55:16,526 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:16,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-15 15:55:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 226. [2022-03-15 15:55:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.2844444444444445) internal successors, (739), 225 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 739 transitions. [2022-03-15 15:55:16,536 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 739 transitions. Word has length 16 [2022-03-15 15:55:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:16,536 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 739 transitions. [2022-03-15 15:55:16,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 739 transitions. [2022-03-15 15:55:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:16,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:16,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:16,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-15 15:55:16,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:16,537 INFO L85 PathProgramCache]: Analyzing trace with hash 94528582, now seen corresponding path program 1 times [2022-03-15 15:55:16,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:16,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25252679] [2022-03-15 15:55:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:16,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:16,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25252679] [2022-03-15 15:55:16,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25252679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:16,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467584169] [2022-03-15 15:55:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:16,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:16,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:16,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 15:55:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:16,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 15:55:16,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467584169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:16,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:16,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-03-15 15:55:16,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28066952] [2022-03-15 15:55:16,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:16,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:55:16,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:55:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:55:16,964 INFO L87 Difference]: Start difference. First operand 226 states and 739 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:17,132 INFO L93 Difference]: Finished difference Result 535 states and 1546 transitions. [2022-03-15 15:55:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:55:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:17,135 INFO L225 Difference]: With dead ends: 535 [2022-03-15 15:55:17,135 INFO L226 Difference]: Without dead ends: 471 [2022-03-15 15:55:17,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:55:17,136 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:17,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 69 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-15 15:55:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 240. [2022-03-15 15:55:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1841004184100417) internal successors, (761), 239 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 761 transitions. [2022-03-15 15:55:17,146 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 761 transitions. Word has length 16 [2022-03-15 15:55:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:17,147 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 761 transitions. [2022-03-15 15:55:17,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 761 transitions. [2022-03-15 15:55:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:17,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:17,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:17,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:17,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 15:55:17,372 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash -757483642, now seen corresponding path program 2 times [2022-03-15 15:55:17,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:17,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28399447] [2022-03-15 15:55:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:17,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:17,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:17,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28399447] [2022-03-15 15:55:17,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28399447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:17,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:17,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:17,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826800292] [2022-03-15 15:55:17,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:17,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:17,424 INFO L87 Difference]: Start difference. First operand 240 states and 761 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:17,538 INFO L93 Difference]: Finished difference Result 461 states and 1294 transitions. [2022-03-15 15:55:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 15:55:17,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:17,540 INFO L225 Difference]: With dead ends: 461 [2022-03-15 15:55:17,541 INFO L226 Difference]: Without dead ends: 434 [2022-03-15 15:55:17,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:55:17,542 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:17,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-15 15:55:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 240. [2022-03-15 15:55:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1757322175732217) internal successors, (759), 239 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 759 transitions. [2022-03-15 15:55:17,551 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 759 transitions. Word has length 16 [2022-03-15 15:55:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 759 transitions. [2022-03-15 15:55:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 759 transitions. [2022-03-15 15:55:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:17,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:17,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:17,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-15 15:55:17,553 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash -472042042, now seen corresponding path program 2 times [2022-03-15 15:55:17,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:17,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341113838] [2022-03-15 15:55:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:17,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:17,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341113838] [2022-03-15 15:55:17,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341113838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:17,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:17,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:17,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379492988] [2022-03-15 15:55:17,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:17,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:17,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:17,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:17,592 INFO L87 Difference]: Start difference. First operand 240 states and 759 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:17,650 INFO L93 Difference]: Finished difference Result 398 states and 1140 transitions. [2022-03-15 15:55:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:55:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:17,652 INFO L225 Difference]: With dead ends: 398 [2022-03-15 15:55:17,652 INFO L226 Difference]: Without dead ends: 361 [2022-03-15 15:55:17,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:55:17,653 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:17,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-15 15:55:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 240. [2022-03-15 15:55:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1673640167364017) internal successors, (757), 239 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 757 transitions. [2022-03-15 15:55:17,662 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 757 transitions. Word has length 16 [2022-03-15 15:55:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:17,662 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 757 transitions. [2022-03-15 15:55:17,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 757 transitions. [2022-03-15 15:55:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:17,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:17,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:17,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-15 15:55:17,663 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1777677254, now seen corresponding path program 3 times [2022-03-15 15:55:17,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:17,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670833996] [2022-03-15 15:55:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:17,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:17,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670833996] [2022-03-15 15:55:17,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670833996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:17,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:17,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:55:17,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755471846] [2022-03-15 15:55:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:17,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:55:17,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:55:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:55:17,685 INFO L87 Difference]: Start difference. First operand 240 states and 757 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:17,728 INFO L93 Difference]: Finished difference Result 343 states and 1007 transitions. [2022-03-15 15:55:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:55:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:17,729 INFO L225 Difference]: With dead ends: 343 [2022-03-15 15:55:17,730 INFO L226 Difference]: Without dead ends: 271 [2022-03-15 15:55:17,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:55:17,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:17,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-15 15:55:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 240. [2022-03-15 15:55:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1338912133891212) internal successors, (749), 239 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 749 transitions. [2022-03-15 15:55:17,739 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 749 transitions. Word has length 16 [2022-03-15 15:55:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:17,739 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 749 transitions. [2022-03-15 15:55:17,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 749 transitions. [2022-03-15 15:55:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:17,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:17,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:17,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-15 15:55:17,742 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1203369498, now seen corresponding path program 3 times [2022-03-15 15:55:17,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:17,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139493977] [2022-03-15 15:55:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:17,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:17,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139493977] [2022-03-15 15:55:17,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139493977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:17,769 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:17,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:55:17,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476472561] [2022-03-15 15:55:17,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:17,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:55:17,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:55:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:55:17,770 INFO L87 Difference]: Start difference. First operand 240 states and 749 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:17,812 INFO L93 Difference]: Finished difference Result 301 states and 906 transitions. [2022-03-15 15:55:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:55:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:17,816 INFO L225 Difference]: With dead ends: 301 [2022-03-15 15:55:17,816 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 15:55:17,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:17,817 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:17,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 15:55:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 219. [2022-03-15 15:55:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.036697247706422) internal successors, (662), 218 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 662 transitions. [2022-03-15 15:55:17,823 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 662 transitions. Word has length 16 [2022-03-15 15:55:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:17,824 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 662 transitions. [2022-03-15 15:55:17,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 662 transitions. [2022-03-15 15:55:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:17,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:17,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:17,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-15 15:55:17,825 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash 664668842, now seen corresponding path program 4 times [2022-03-15 15:55:17,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:17,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263512528] [2022-03-15 15:55:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:17,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:17,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263512528] [2022-03-15 15:55:17,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263512528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:17,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:17,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 15:55:17,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470321350] [2022-03-15 15:55:17,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 15:55:17,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 15:55:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:55:17,857 INFO L87 Difference]: Start difference. First operand 219 states and 662 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:17,896 INFO L93 Difference]: Finished difference Result 272 states and 791 transitions. [2022-03-15 15:55:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 15:55:17,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:17,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:17,897 INFO L225 Difference]: With dead ends: 272 [2022-03-15 15:55:17,897 INFO L226 Difference]: Without dead ends: 209 [2022-03-15 15:55:17,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 15:55:17,898 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:17,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-15 15:55:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-15 15:55:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2022-03-15 15:55:17,904 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2022-03-15 15:55:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2022-03-15 15:55:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2022-03-15 15:55:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:55:17,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:17,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:17,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-15 15:55:17,906 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash 402212618, now seen corresponding path program 3 times [2022-03-15 15:55:17,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:17,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596008589] [2022-03-15 15:55:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:17,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:17,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:17,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596008589] [2022-03-15 15:55:17,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596008589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:55:17,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:55:17,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:55:17,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542117865] [2022-03-15 15:55:17,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:55:17,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:55:17,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:17,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:55:17,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:55:17,960 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:18,016 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2022-03-15 15:55:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:55:18,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:55:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:18,018 INFO L225 Difference]: With dead ends: 238 [2022-03-15 15:55:18,018 INFO L226 Difference]: Without dead ends: 189 [2022-03-15 15:55:18,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:55:18,019 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:18,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:55:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-15 15:55:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-15 15:55:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-15 15:55:18,025 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2022-03-15 15:55:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:18,025 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-15 15:55:18,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-15 15:55:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:18,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:18,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:18,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-15 15:55:18,026 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:18,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1843106918, now seen corresponding path program 1 times [2022-03-15 15:55:18,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:18,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217393230] [2022-03-15 15:55:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:18,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:18,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:18,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217393230] [2022-03-15 15:55:18,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217393230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:18,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861610802] [2022-03-15 15:55:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:18,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:18,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:18,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:18,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 15:55:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:18,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:18,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:18,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 214 [2022-03-15 15:55:19,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 218 [2022-03-15 15:55:19,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 152 [2022-03-15 15:55:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:19,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:19,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 214 [2022-03-15 15:55:20,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:20,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-03-15 15:55:20,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-15 15:55:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:20,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861610802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:20,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:20,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-15 15:55:20,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702526500] [2022-03-15 15:55:20,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:20,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:55:20,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:55:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:55:20,694 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:23,071 INFO L93 Difference]: Finished difference Result 756 states and 2092 transitions. [2022-03-15 15:55:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:55:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:23,075 INFO L225 Difference]: With dead ends: 756 [2022-03-15 15:55:23,075 INFO L226 Difference]: Without dead ends: 606 [2022-03-15 15:55:23,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:55:23,076 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 266 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:23,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 249 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:55:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-03-15 15:55:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 236. [2022-03-15 15:55:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.157446808510638) internal successors, (742), 235 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 742 transitions. [2022-03-15 15:55:23,087 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 742 transitions. Word has length 20 [2022-03-15 15:55:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:23,088 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 742 transitions. [2022-03-15 15:55:23,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 742 transitions. [2022-03-15 15:55:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:23,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:23,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:23,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:23,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-03-15 15:55:23,310 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1866509036, now seen corresponding path program 2 times [2022-03-15 15:55:23,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:23,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753901176] [2022-03-15 15:55:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:23,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:23,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:23,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753901176] [2022-03-15 15:55:23,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753901176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:23,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829204021] [2022-03-15 15:55:23,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:23,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:23,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:23,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 15:55:23,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:23,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 182 [2022-03-15 15:55:24,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 15:55:24,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 124 [2022-03-15 15:55:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:24,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:24,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 223 [2022-03-15 15:55:25,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:25,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-03-15 15:55:25,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-15 15:55:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:25,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829204021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:25,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:25,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-03-15 15:55:25,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883863742] [2022-03-15 15:55:25,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:25,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:25,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:25,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:25,426 INFO L87 Difference]: Start difference. First operand 236 states and 742 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:26,556 INFO L93 Difference]: Finished difference Result 574 states and 1650 transitions. [2022-03-15 15:55:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:55:26,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:26,559 INFO L225 Difference]: With dead ends: 574 [2022-03-15 15:55:26,559 INFO L226 Difference]: Without dead ends: 490 [2022-03-15 15:55:26,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:55:26,560 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:26,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 274 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:55:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-03-15 15:55:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 274. [2022-03-15 15:55:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.10989010989011) internal successors, (849), 273 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 849 transitions. [2022-03-15 15:55:26,569 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 849 transitions. Word has length 20 [2022-03-15 15:55:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:26,569 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 849 transitions. [2022-03-15 15:55:26,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 849 transitions. [2022-03-15 15:55:26,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:26,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:26,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:26,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:26,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:26,797 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:26,798 INFO L85 PathProgramCache]: Analyzing trace with hash -820679224, now seen corresponding path program 3 times [2022-03-15 15:55:26,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:26,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498556300] [2022-03-15 15:55:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:26,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:27,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498556300] [2022-03-15 15:55:27,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498556300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:27,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880876077] [2022-03-15 15:55:27,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:27,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:27,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:27,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 15:55:27,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:55:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:27,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-15 15:55:27,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 197 [2022-03-15 15:55:27,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 157 [2022-03-15 15:55:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:27,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 214 [2022-03-15 15:55:28,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:28,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-03-15 15:55:28,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-15 15:55:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:28,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880876077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:28,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:28,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-03-15 15:55:28,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234175525] [2022-03-15 15:55:28,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:28,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:55:28,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:55:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:55:28,685 INFO L87 Difference]: Start difference. First operand 274 states and 849 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:29,918 INFO L93 Difference]: Finished difference Result 582 states and 1687 transitions. [2022-03-15 15:55:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:55:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:29,921 INFO L225 Difference]: With dead ends: 582 [2022-03-15 15:55:29,921 INFO L226 Difference]: Without dead ends: 535 [2022-03-15 15:55:29,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:55:29,922 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 176 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:29,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 232 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:55:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-15 15:55:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 272. [2022-03-15 15:55:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.081180811808118) internal successors, (835), 271 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 835 transitions. [2022-03-15 15:55:29,931 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 835 transitions. Word has length 20 [2022-03-15 15:55:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:29,931 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 835 transitions. [2022-03-15 15:55:29,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 835 transitions. [2022-03-15 15:55:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:29,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:29,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:29,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:30,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,155 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1053139844, now seen corresponding path program 4 times [2022-03-15 15:55:30,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:30,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328063835] [2022-03-15 15:55:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:30,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:30,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:30,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328063835] [2022-03-15 15:55:30,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328063835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:30,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529241002] [2022-03-15 15:55:30,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:30,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:30,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:30,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 15:55:30,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:30,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 238 [2022-03-15 15:55:30,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-15 15:55:30,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 15:55:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:31,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:31,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-03-15 15:55:31,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-03-15 15:55:31,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:31,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 163 [2022-03-15 15:55:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:32,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529241002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:32,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:32,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-03-15 15:55:32,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342941520] [2022-03-15 15:55:32,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:32,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:55:32,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:55:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:55:32,092 INFO L87 Difference]: Start difference. First operand 272 states and 835 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:34,025 INFO L93 Difference]: Finished difference Result 774 states and 2234 transitions. [2022-03-15 15:55:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:55:34,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:34,031 INFO L225 Difference]: With dead ends: 774 [2022-03-15 15:55:34,031 INFO L226 Difference]: Without dead ends: 687 [2022-03-15 15:55:34,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=1810, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:55:34,032 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 173 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:34,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 378 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:55:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-15 15:55:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 312. [2022-03-15 15:55:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0192926045016075) internal successors, (939), 311 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 939 transitions. [2022-03-15 15:55:34,042 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 939 transitions. Word has length 20 [2022-03-15 15:55:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:34,042 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 939 transitions. [2022-03-15 15:55:34,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 939 transitions. [2022-03-15 15:55:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:34,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:34,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:34,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:34,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 15:55:34,260 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1025069888, now seen corresponding path program 5 times [2022-03-15 15:55:34,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:34,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765579405] [2022-03-15 15:55:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:34,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765579405] [2022-03-15 15:55:34,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765579405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:34,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246601490] [2022-03-15 15:55:34,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:34,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:34,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:34,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:34,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 15:55:34,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:34,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:34,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:34,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 146 [2022-03-15 15:55:34,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-03-15 15:55:34,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-03-15 15:55:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:35,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:35,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-03-15 15:55:35,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:35,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 289 [2022-03-15 15:55:35,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 223 [2022-03-15 15:55:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:35,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246601490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:35,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:35,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-15 15:55:35,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832503706] [2022-03-15 15:55:35,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:35,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:55:35,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:35,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:55:35,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:55:35,963 INFO L87 Difference]: Start difference. First operand 312 states and 939 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:36,353 INFO L93 Difference]: Finished difference Result 472 states and 1411 transitions. [2022-03-15 15:55:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:55:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:36,356 INFO L225 Difference]: With dead ends: 472 [2022-03-15 15:55:36,356 INFO L226 Difference]: Without dead ends: 433 [2022-03-15 15:55:36,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:36,356 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:36,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 163 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-03-15 15:55:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 317. [2022-03-15 15:55:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.018987341772152) internal successors, (954), 316 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 954 transitions. [2022-03-15 15:55:36,365 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 954 transitions. Word has length 20 [2022-03-15 15:55:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:36,365 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 954 transitions. [2022-03-15 15:55:36,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 954 transitions. [2022-03-15 15:55:36,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:36,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:36,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:36,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 15:55:36,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:36,579 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash 150420756, now seen corresponding path program 6 times [2022-03-15 15:55:36,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:36,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888692237] [2022-03-15 15:55:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:36,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:36,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888692237] [2022-03-15 15:55:36,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888692237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:36,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144908495] [2022-03-15 15:55:36,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:36,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:36,736 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:36,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 15:55:36,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:55:36,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:36,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 15:55:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:37,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 197 [2022-03-15 15:55:37,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:37,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 159 [2022-03-15 15:55:37,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:37,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 152 [2022-03-15 15:55:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:37,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:38,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:38,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 204 [2022-03-15 15:55:38,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:55:38,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:38,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 60 [2022-03-15 15:55:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:39,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144908495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:39,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:39,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 24 [2022-03-15 15:55:39,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502286790] [2022-03-15 15:55:39,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:39,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:39,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:39,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:39,109 INFO L87 Difference]: Start difference. First operand 317 states and 954 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:42,223 INFO L93 Difference]: Finished difference Result 876 states and 2527 transitions. [2022-03-15 15:55:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:55:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:42,227 INFO L225 Difference]: With dead ends: 876 [2022-03-15 15:55:42,227 INFO L226 Difference]: Without dead ends: 704 [2022-03-15 15:55:42,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 15:55:42,228 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 160 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:42,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 522 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:55:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-15 15:55:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 350. [2022-03-15 15:55:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.04297994269341) internal successors, (1062), 349 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1062 transitions. [2022-03-15 15:55:42,238 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1062 transitions. Word has length 20 [2022-03-15 15:55:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:42,238 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1062 transitions. [2022-03-15 15:55:42,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1062 transitions. [2022-03-15 15:55:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:42,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:42,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:42,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-15 15:55:42,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:42,462 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash -903528158, now seen corresponding path program 7 times [2022-03-15 15:55:42,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:42,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722766281] [2022-03-15 15:55:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:42,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:42,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722766281] [2022-03-15 15:55:42,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722766281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:42,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732732095] [2022-03-15 15:55:42,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:42,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:42,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:42,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:42,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 15:55:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:42,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-15 15:55:43,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-03-15 15:55:43,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:43,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 146 [2022-03-15 15:55:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:43,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:43,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 203 [2022-03-15 15:55:43,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 238 [2022-03-15 15:55:43,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:43,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 229 [2022-03-15 15:55:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:44,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732732095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:44,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:44,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 15:55:44,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628288968] [2022-03-15 15:55:44,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:44,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:55:44,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:55:44,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:55:44,480 INFO L87 Difference]: Start difference. First operand 350 states and 1062 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:45,630 INFO L93 Difference]: Finished difference Result 783 states and 2214 transitions. [2022-03-15 15:55:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:55:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:45,638 INFO L225 Difference]: With dead ends: 783 [2022-03-15 15:55:45,638 INFO L226 Difference]: Without dead ends: 655 [2022-03-15 15:55:45,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:55:45,639 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:45,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 275 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:55:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-15 15:55:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 364. [2022-03-15 15:55:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.0853994490358128) internal successors, (1120), 363 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1120 transitions. [2022-03-15 15:55:45,648 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1120 transitions. Word has length 20 [2022-03-15 15:55:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:45,648 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1120 transitions. [2022-03-15 15:55:45,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1120 transitions. [2022-03-15 15:55:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:45,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:45,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:45,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:45,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 15:55:45,863 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:45,864 INFO L85 PathProgramCache]: Analyzing trace with hash -429455834, now seen corresponding path program 8 times [2022-03-15 15:55:45,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:45,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085060144] [2022-03-15 15:55:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:45,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:45,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085060144] [2022-03-15 15:55:45,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085060144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:45,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135003983] [2022-03-15 15:55:45,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:45,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:45,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:45,956 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:45,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 15:55:46,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:46,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 153 [2022-03-15 15:55:46,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 158 [2022-03-15 15:55:46,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-03-15 15:55:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:46,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:46,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-03-15 15:55:47,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:47,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-03-15 15:55:47,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-03-15 15:55:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:47,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135003983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:47,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:47,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:55:47,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141513261] [2022-03-15 15:55:47,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:47,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:55:47,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:55:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:55:47,346 INFO L87 Difference]: Start difference. First operand 364 states and 1120 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:47,674 INFO L93 Difference]: Finished difference Result 641 states and 1886 transitions. [2022-03-15 15:55:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:55:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:47,677 INFO L225 Difference]: With dead ends: 641 [2022-03-15 15:55:47,677 INFO L226 Difference]: Without dead ends: 511 [2022-03-15 15:55:47,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:55:47,677 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:47,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 154 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-15 15:55:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 369. [2022-03-15 15:55:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0842391304347827) internal successors, (1135), 368 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1135 transitions. [2022-03-15 15:55:47,685 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1135 transitions. Word has length 20 [2022-03-15 15:55:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:47,686 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1135 transitions. [2022-03-15 15:55:47,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1135 transitions. [2022-03-15 15:55:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:47,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:47,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:47,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:47,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 15:55:47,909 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2074195750, now seen corresponding path program 9 times [2022-03-15 15:55:47,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:47,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465639897] [2022-03-15 15:55:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:48,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:48,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465639897] [2022-03-15 15:55:48,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465639897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:48,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777488263] [2022-03-15 15:55:48,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:48,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:48,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:48,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 15:55:48,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:55:48,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:48,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 192 [2022-03-15 15:55:48,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 277 [2022-03-15 15:55:48,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 222 [2022-03-15 15:55:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:48,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:49,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 218 [2022-03-15 15:55:49,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:49,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-03-15 15:55:49,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-03-15 15:55:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:49,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777488263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:49,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:49,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:55:49,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214382178] [2022-03-15 15:55:49,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:49,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:55:49,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:55:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:55:49,748 INFO L87 Difference]: Start difference. First operand 369 states and 1135 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:50,321 INFO L93 Difference]: Finished difference Result 843 states and 2465 transitions. [2022-03-15 15:55:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:55:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:50,324 INFO L225 Difference]: With dead ends: 843 [2022-03-15 15:55:50,324 INFO L226 Difference]: Without dead ends: 698 [2022-03-15 15:55:50,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:50,324 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 273 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:50,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 167 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-15 15:55:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 378. [2022-03-15 15:55:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.1061007957559683) internal successors, (1171), 377 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1171 transitions. [2022-03-15 15:55:50,334 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1171 transitions. Word has length 20 [2022-03-15 15:55:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:50,334 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1171 transitions. [2022-03-15 15:55:50,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1171 transitions. [2022-03-15 15:55:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:50,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:50,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:50,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:50,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 15:55:50,558 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:50,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash -607204812, now seen corresponding path program 10 times [2022-03-15 15:55:50,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:50,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117631970] [2022-03-15 15:55:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:50,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:50,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:50,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117631970] [2022-03-15 15:55:50,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117631970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:50,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639185497] [2022-03-15 15:55:50,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:50,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:50,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:50,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:50,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 15:55:50,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:50,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:50,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 159 [2022-03-15 15:55:51,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 15:55:51,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 124 [2022-03-15 15:55:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:51,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:51,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-03-15 15:55:51,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 290 [2022-03-15 15:55:51,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:51,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 259 [2022-03-15 15:55:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:52,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639185497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:52,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:52,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:55:52,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644953185] [2022-03-15 15:55:52,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:52,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:55:52,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:55:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:55:52,388 INFO L87 Difference]: Start difference. First operand 378 states and 1171 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:52,697 INFO L93 Difference]: Finished difference Result 654 states and 1943 transitions. [2022-03-15 15:55:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:55:52,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:52,700 INFO L225 Difference]: With dead ends: 654 [2022-03-15 15:55:52,700 INFO L226 Difference]: Without dead ends: 534 [2022-03-15 15:55:52,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:55:52,701 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:52,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 154 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-15 15:55:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 369. [2022-03-15 15:55:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0842391304347827) internal successors, (1135), 368 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1135 transitions. [2022-03-15 15:55:52,709 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1135 transitions. Word has length 20 [2022-03-15 15:55:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:52,709 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1135 transitions. [2022-03-15 15:55:52,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1135 transitions. [2022-03-15 15:55:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:52,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:52,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:52,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:52,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 15:55:52,933 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1630065868, now seen corresponding path program 11 times [2022-03-15 15:55:52,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:52,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079411275] [2022-03-15 15:55:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:53,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:53,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079411275] [2022-03-15 15:55:53,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079411275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:53,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33069609] [2022-03-15 15:55:53,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:53,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:53,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:53,036 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:53,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 15:55:53,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:53,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:53,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-03-15 15:55:53,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-15 15:55:53,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 15:55:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:53,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:53,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-03-15 15:55:54,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:54,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 238 [2022-03-15 15:55:54,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-03-15 15:55:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:54,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33069609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:54,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:54,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:55:54,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967527806] [2022-03-15 15:55:54,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:54,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:55:54,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:54,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:55:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:55:54,388 INFO L87 Difference]: Start difference. First operand 369 states and 1135 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:54,540 INFO L93 Difference]: Finished difference Result 520 states and 1591 transitions. [2022-03-15 15:55:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:55:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:54,543 INFO L225 Difference]: With dead ends: 520 [2022-03-15 15:55:54,543 INFO L226 Difference]: Without dead ends: 481 [2022-03-15 15:55:54,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:55:54,543 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:54,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 84 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-15 15:55:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 376. [2022-03-15 15:55:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.0853333333333333) internal successors, (1157), 375 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1157 transitions. [2022-03-15 15:55:54,551 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1157 transitions. Word has length 20 [2022-03-15 15:55:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:54,551 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1157 transitions. [2022-03-15 15:55:54,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1157 transitions. [2022-03-15 15:55:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:54,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:54,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:54,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:54,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:54,753 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:54,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1489410784, now seen corresponding path program 12 times [2022-03-15 15:55:54,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:54,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682770877] [2022-03-15 15:55:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:54,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:54,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:54,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682770877] [2022-03-15 15:55:54,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682770877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:54,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459948814] [2022-03-15 15:55:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:54,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:54,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:54,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 15:55:54,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:55:54,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:55:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:55,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-15 15:55:55,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-03-15 15:55:55,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 194 [2022-03-15 15:55:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:55,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:55,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 208 [2022-03-15 15:55:56,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:56,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 208 [2022-03-15 15:55:56,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-03-15 15:55:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:56,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459948814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:56,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:56,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:55:56,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55793544] [2022-03-15 15:55:56,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:56,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:55:56,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:55:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:55:56,667 INFO L87 Difference]: Start difference. First operand 376 states and 1157 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:57,361 INFO L93 Difference]: Finished difference Result 974 states and 2755 transitions. [2022-03-15 15:55:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:55:57,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:57,365 INFO L225 Difference]: With dead ends: 974 [2022-03-15 15:55:57,365 INFO L226 Difference]: Without dead ends: 830 [2022-03-15 15:55:57,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:57,366 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:57,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 202 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-15 15:55:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 407. [2022-03-15 15:55:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1945812807881775) internal successors, (1297), 406 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1297 transitions. [2022-03-15 15:55:57,376 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1297 transitions. Word has length 20 [2022-03-15 15:55:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:57,376 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1297 transitions. [2022-03-15 15:55:57,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1297 transitions. [2022-03-15 15:55:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 15:55:57,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:57,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:57,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:57,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-15 15:55:57,595 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash 124155950, now seen corresponding path program 13 times [2022-03-15 15:55:57,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:57,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307059234] [2022-03-15 15:55:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:57,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:57,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:57,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307059234] [2022-03-15 15:55:57,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307059234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:57,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395424294] [2022-03-15 15:55:57,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:57,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:57,677 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:57,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 15:55:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 15:55:57,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:57,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 237 [2022-03-15 15:55:58,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 15:55:58,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 138 [2022-03-15 15:55:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:58,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:58,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 131 [2022-03-15 15:55:58,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-03-15 15:55:58,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:58,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 168 [2022-03-15 15:55:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:59,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395424294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:59,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:59,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:55:59,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970790865] [2022-03-15 15:55:59,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:59,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:55:59,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:59,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:55:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:55:59,255 INFO L87 Difference]: Start difference. First operand 407 states and 1297 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:59,458 INFO L93 Difference]: Finished difference Result 552 states and 1668 transitions. [2022-03-15 15:55:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:55:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 15:55:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:59,460 INFO L225 Difference]: With dead ends: 552 [2022-03-15 15:55:59,460 INFO L226 Difference]: Without dead ends: 432 [2022-03-15 15:55:59,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:55:59,461 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:59,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 109 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-03-15 15:55:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 407. [2022-03-15 15:55:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1724137931034484) internal successors, (1288), 406 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1288 transitions. [2022-03-15 15:55:59,468 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1288 transitions. Word has length 20 [2022-03-15 15:55:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:59,468 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1288 transitions. [2022-03-15 15:55:59,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1288 transitions. [2022-03-15 15:55:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:55:59,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:59,469 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:59,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 15:55:59,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:59,685 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:55:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1803651538, now seen corresponding path program 14 times [2022-03-15 15:55:59,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:59,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846209420] [2022-03-15 15:55:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:59,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:59,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846209420] [2022-03-15 15:55:59,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846209420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:59,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71987825] [2022-03-15 15:55:59,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:59,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:59,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:59,812 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:59,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 15:55:59,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:59,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:59,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:55:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:59,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:55:59,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 15:55:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:00,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-03-15 15:56:00,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:00,383 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:56:00,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:56:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:00,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71987825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:00,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:00,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 17 [2022-03-15 15:56:00,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250939420] [2022-03-15 15:56:00,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:00,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:56:00,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:56:00,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:00,391 INFO L87 Difference]: Start difference. First operand 407 states and 1288 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:01,200 INFO L93 Difference]: Finished difference Result 851 states and 2578 transitions. [2022-03-15 15:56:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:56:01,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:01,204 INFO L225 Difference]: With dead ends: 851 [2022-03-15 15:56:01,204 INFO L226 Difference]: Without dead ends: 773 [2022-03-15 15:56:01,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:56:01,205 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:01,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 284 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:56:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-03-15 15:56:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 394. [2022-03-15 15:56:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.2111959287531806) internal successors, (1262), 393 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1262 transitions. [2022-03-15 15:56:01,214 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1262 transitions. Word has length 21 [2022-03-15 15:56:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:01,214 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1262 transitions. [2022-03-15 15:56:01,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1262 transitions. [2022-03-15 15:56:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:01,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:01,215 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:01,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:01,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:01,429 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:01,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1064525268, now seen corresponding path program 15 times [2022-03-15 15:56:01,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:01,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189704771] [2022-03-15 15:56:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:01,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:01,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:01,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189704771] [2022-03-15 15:56:01,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189704771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:01,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839663958] [2022-03-15 15:56:01,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:01,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:01,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:01,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:01,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 15:56:01,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:01,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:01,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:01,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:01,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 15:56:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:01,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:01,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-03-15 15:56:02,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:02,206 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:56:02,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:56:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:02,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839663958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:02,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:02,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-15 15:56:02,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114945885] [2022-03-15 15:56:02,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:02,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:56:02,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:02,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:56:02,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:02,210 INFO L87 Difference]: Start difference. First operand 394 states and 1262 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:03,330 INFO L93 Difference]: Finished difference Result 938 states and 2859 transitions. [2022-03-15 15:56:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:56:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:03,334 INFO L225 Difference]: With dead ends: 938 [2022-03-15 15:56:03,334 INFO L226 Difference]: Without dead ends: 852 [2022-03-15 15:56:03,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=1300, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:56:03,335 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:03,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 315 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:56:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-03-15 15:56:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 404. [2022-03-15 15:56:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.228287841191067) internal successors, (1301), 403 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1301 transitions. [2022-03-15 15:56:03,343 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1301 transitions. Word has length 21 [2022-03-15 15:56:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:03,344 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1301 transitions. [2022-03-15 15:56:03,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1301 transitions. [2022-03-15 15:56:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:03,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:03,345 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:03,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:03,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-15 15:56:03,560 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash 110965376, now seen corresponding path program 16 times [2022-03-15 15:56:03,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:03,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486755092] [2022-03-15 15:56:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:03,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:03,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:03,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486755092] [2022-03-15 15:56:03,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486755092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:03,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493568069] [2022-03-15 15:56:03,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:03,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:03,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:03,682 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:03,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 15:56:03,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:03,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:03,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:03,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:03,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 186 [2022-03-15 15:56:03,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-03-15 15:56:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:04,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:04,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-03-15 15:56:04,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:04,586 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:56:04,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:56:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:04,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493568069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:04,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:04,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-15 15:56:04,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162528184] [2022-03-15 15:56:04,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:04,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:04,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:04,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:04,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:04,590 INFO L87 Difference]: Start difference. First operand 404 states and 1301 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:04,860 INFO L93 Difference]: Finished difference Result 689 states and 2111 transitions. [2022-03-15 15:56:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:04,864 INFO L225 Difference]: With dead ends: 689 [2022-03-15 15:56:04,864 INFO L226 Difference]: Without dead ends: 638 [2022-03-15 15:56:04,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:04,864 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:04,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 121 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-15 15:56:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 414. [2022-03-15 15:56:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.2687651331719128) internal successors, (1350), 413 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1350 transitions. [2022-03-15 15:56:04,873 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1350 transitions. Word has length 21 [2022-03-15 15:56:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:04,873 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1350 transitions. [2022-03-15 15:56:04,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1350 transitions. [2022-03-15 15:56:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:04,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:04,874 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:04,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:05,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:05,092 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1724532110, now seen corresponding path program 17 times [2022-03-15 15:56:05,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:05,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141790476] [2022-03-15 15:56:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:05,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:05,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:05,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141790476] [2022-03-15 15:56:05,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141790476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:05,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191089655] [2022-03-15 15:56:05,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:05,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:05,219 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:05,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 15:56:05,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:56:05,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:05,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:05,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 15:56:05,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 117 [2022-03-15 15:56:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:05,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 285 [2022-03-15 15:56:06,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:06,131 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:56:06,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:56:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:06,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191089655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:06,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:06,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-15 15:56:06,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096031643] [2022-03-15 15:56:06,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:56:06,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:56:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:06,135 INFO L87 Difference]: Start difference. First operand 414 states and 1350 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:07,879 INFO L93 Difference]: Finished difference Result 1007 states and 2958 transitions. [2022-03-15 15:56:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 15:56:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:07,886 INFO L225 Difference]: With dead ends: 1007 [2022-03-15 15:56:07,886 INFO L226 Difference]: Without dead ends: 812 [2022-03-15 15:56:07,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=537, Invalid=2219, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:56:07,887 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:07,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 306 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:56:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-15 15:56:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 422. [2022-03-15 15:56:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.2066508313539193) internal successors, (1350), 421 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1350 transitions. [2022-03-15 15:56:07,897 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1350 transitions. Word has length 21 [2022-03-15 15:56:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:07,897 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1350 transitions. [2022-03-15 15:56:07,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1350 transitions. [2022-03-15 15:56:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:07,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:07,898 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:07,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:08,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:08,115 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 763550390, now seen corresponding path program 18 times [2022-03-15 15:56:08,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:08,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071922256] [2022-03-15 15:56:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:08,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:08,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:08,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071922256] [2022-03-15 15:56:08,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071922256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:08,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086841102] [2022-03-15 15:56:08,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:08,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:08,310 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:08,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 15:56:08,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:08,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:08,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:08,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:08,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-03-15 15:56:08,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 15:56:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:08,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:09,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 284 [2022-03-15 15:56:09,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:09,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 265 [2022-03-15 15:56:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:09,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086841102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:09,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:09,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-03-15 15:56:09,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296394541] [2022-03-15 15:56:09,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:09,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:09,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:09,241 INFO L87 Difference]: Start difference. First operand 422 states and 1350 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:10,612 INFO L93 Difference]: Finished difference Result 1091 states and 3208 transitions. [2022-03-15 15:56:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:56:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:10,614 INFO L225 Difference]: With dead ends: 1091 [2022-03-15 15:56:10,614 INFO L226 Difference]: Without dead ends: 842 [2022-03-15 15:56:10,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=454, Invalid=1802, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:56:10,615 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:10,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 283 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:56:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-15 15:56:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 495. [2022-03-15 15:56:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.133603238866397) internal successors, (1548), 494 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1548 transitions. [2022-03-15 15:56:10,627 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1548 transitions. Word has length 21 [2022-03-15 15:56:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:10,627 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1548 transitions. [2022-03-15 15:56:10,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1548 transitions. [2022-03-15 15:56:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:10,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:10,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:10,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:10,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:10,856 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -76145436, now seen corresponding path program 19 times [2022-03-15 15:56:10,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:10,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258378752] [2022-03-15 15:56:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:10,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:10,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258378752] [2022-03-15 15:56:10,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258378752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:10,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478897926] [2022-03-15 15:56:10,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:10,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:10,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:10,960 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 15:56:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:11,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:11,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-03-15 15:56:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:11,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:11,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 173 [2022-03-15 15:56:11,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:11,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:11,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478897926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:11,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:11,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 15:56:11,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401408625] [2022-03-15 15:56:11,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:11,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:56:11,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:56:11,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:11,667 INFO L87 Difference]: Start difference. First operand 495 states and 1548 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:11,939 INFO L93 Difference]: Finished difference Result 705 states and 2177 transitions. [2022-03-15 15:56:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:11,941 INFO L225 Difference]: With dead ends: 705 [2022-03-15 15:56:11,941 INFO L226 Difference]: Without dead ends: 653 [2022-03-15 15:56:11,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:11,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:11,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 116 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-15 15:56:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 539. [2022-03-15 15:56:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.1617100371747213) internal successors, (1701), 538 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1701 transitions. [2022-03-15 15:56:11,950 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1701 transitions. Word has length 21 [2022-03-15 15:56:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:11,951 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1701 transitions. [2022-03-15 15:56:11,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1701 transitions. [2022-03-15 15:56:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:11,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:11,952 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:11,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:12,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 15:56:12,164 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash 266104058, now seen corresponding path program 20 times [2022-03-15 15:56:12,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:12,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432399474] [2022-03-15 15:56:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:12,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:12,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432399474] [2022-03-15 15:56:12,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432399474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:12,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968133331] [2022-03-15 15:56:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:12,267 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:12,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 15:56:12,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:12,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:12,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 129 [2022-03-15 15:56:12,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 113 [2022-03-15 15:56:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:12,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:12,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-03-15 15:56:13,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:13,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-03-15 15:56:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:13,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968133331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:13,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:13,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 15:56:13,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42561771] [2022-03-15 15:56:13,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:13,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:56:13,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:56:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:13,219 INFO L87 Difference]: Start difference. First operand 539 states and 1701 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:13,584 INFO L93 Difference]: Finished difference Result 809 states and 2493 transitions. [2022-03-15 15:56:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:56:13,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:13,586 INFO L225 Difference]: With dead ends: 809 [2022-03-15 15:56:13,586 INFO L226 Difference]: Without dead ends: 742 [2022-03-15 15:56:13,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:13,587 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:13,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-15 15:56:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 567. [2022-03-15 15:56:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.234982332155477) internal successors, (1831), 566 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1831 transitions. [2022-03-15 15:56:13,596 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1831 transitions. Word has length 21 [2022-03-15 15:56:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:13,596 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1831 transitions. [2022-03-15 15:56:13,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1831 transitions. [2022-03-15 15:56:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:13,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:13,597 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:13,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 15:56:13,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 15:56:13,798 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1940063640, now seen corresponding path program 21 times [2022-03-15 15:56:13,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:13,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010702825] [2022-03-15 15:56:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:14,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:14,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010702825] [2022-03-15 15:56:14,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010702825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:14,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407529392] [2022-03-15 15:56:14,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:14,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:14,014 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:14,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 15:56:14,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:56:14,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:14,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:14,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 129 [2022-03-15 15:56:14,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 113 [2022-03-15 15:56:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:14,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:14,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 216 [2022-03-15 15:56:14,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:14,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:14,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407529392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:14,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:14,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-03-15 15:56:14,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636814426] [2022-03-15 15:56:14,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:14,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:14,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:14,897 INFO L87 Difference]: Start difference. First operand 567 states and 1831 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:15,648 INFO L93 Difference]: Finished difference Result 933 states and 2786 transitions. [2022-03-15 15:56:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:56:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:15,650 INFO L225 Difference]: With dead ends: 933 [2022-03-15 15:56:15,650 INFO L226 Difference]: Without dead ends: 881 [2022-03-15 15:56:15,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:56:15,651 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:15,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 249 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:56:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-03-15 15:56:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 545. [2022-03-15 15:56:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.198529411764706) internal successors, (1740), 544 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1740 transitions. [2022-03-15 15:56:15,660 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1740 transitions. Word has length 21 [2022-03-15 15:56:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:15,660 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1740 transitions. [2022-03-15 15:56:15,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1740 transitions. [2022-03-15 15:56:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:15,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:15,661 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:15,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 15:56:15,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 15:56:15,861 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash 64137700, now seen corresponding path program 22 times [2022-03-15 15:56:15,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:15,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951271072] [2022-03-15 15:56:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:15,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:15,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:15,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951271072] [2022-03-15 15:56:15,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951271072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:15,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474222966] [2022-03-15 15:56:15,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:15,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:15,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:15,968 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:15,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 15:56:16,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:16,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:16,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-03-15 15:56:16,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 15:56:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:16,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:16,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-03-15 15:56:16,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:16,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 221 [2022-03-15 15:56:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:16,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474222966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:16,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:16,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-03-15 15:56:16,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225260892] [2022-03-15 15:56:16,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:16,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:56:16,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:56:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:56:16,829 INFO L87 Difference]: Start difference. First operand 545 states and 1740 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:17,140 INFO L93 Difference]: Finished difference Result 794 states and 2413 transitions. [2022-03-15 15:56:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:17,142 INFO L225 Difference]: With dead ends: 794 [2022-03-15 15:56:17,142 INFO L226 Difference]: Without dead ends: 706 [2022-03-15 15:56:17,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:17,143 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:17,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 149 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-15 15:56:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 556. [2022-03-15 15:56:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.218018018018018) internal successors, (1786), 555 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1786 transitions. [2022-03-15 15:56:17,150 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1786 transitions. Word has length 21 [2022-03-15 15:56:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:17,150 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1786 transitions. [2022-03-15 15:56:17,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1786 transitions. [2022-03-15 15:56:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:17,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:17,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:17,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:17,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:17,359 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:17,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 417277190, now seen corresponding path program 23 times [2022-03-15 15:56:17,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:17,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560805136] [2022-03-15 15:56:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:17,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:17,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560805136] [2022-03-15 15:56:17,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560805136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:17,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185218123] [2022-03-15 15:56:17,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:17,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:17,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:17,496 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:17,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 15:56:17,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:17,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:17,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 147 [2022-03-15 15:56:17,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-15 15:56:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:17,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:18,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:18,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 173 [2022-03-15 15:56:18,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 15:56:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:18,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185218123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:18,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:18,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 15:56:18,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017470469] [2022-03-15 15:56:18,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:18,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:56:18,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:56:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:18,275 INFO L87 Difference]: Start difference. First operand 556 states and 1786 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:18,728 INFO L93 Difference]: Finished difference Result 929 states and 2821 transitions. [2022-03-15 15:56:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:18,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:18,730 INFO L225 Difference]: With dead ends: 929 [2022-03-15 15:56:18,730 INFO L226 Difference]: Without dead ends: 862 [2022-03-15 15:56:18,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:18,731 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:18,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 171 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-03-15 15:56:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 586. [2022-03-15 15:56:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.2786324786324785) internal successors, (1918), 585 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1918 transitions. [2022-03-15 15:56:18,741 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1918 transitions. Word has length 21 [2022-03-15 15:56:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:18,741 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1918 transitions. [2022-03-15 15:56:18,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1918 transitions. [2022-03-15 15:56:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:18,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:18,742 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:18,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-15 15:56:18,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:18,942 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2091236772, now seen corresponding path program 24 times [2022-03-15 15:56:18,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:18,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517074255] [2022-03-15 15:56:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:18,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:19,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:19,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517074255] [2022-03-15 15:56:19,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517074255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:19,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098666883] [2022-03-15 15:56:19,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:19,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:19,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:19,051 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:19,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 15:56:19,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:19,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:19,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:19,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:19,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-03-15 15:56:19,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:56:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:19,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:19,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-03-15 15:56:19,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:19,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 180 [2022-03-15 15:56:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:19,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098666883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:19,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:19,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 15:56:19,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883279224] [2022-03-15 15:56:19,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:19,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:56:19,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:56:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:19,927 INFO L87 Difference]: Start difference. First operand 586 states and 1918 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:20,180 INFO L93 Difference]: Finished difference Result 802 states and 2476 transitions. [2022-03-15 15:56:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:20,185 INFO L225 Difference]: With dead ends: 802 [2022-03-15 15:56:20,185 INFO L226 Difference]: Without dead ends: 750 [2022-03-15 15:56:20,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:20,186 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:20,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 132 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-03-15 15:56:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 546. [2022-03-15 15:56:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 3.2091743119266054) internal successors, (1749), 545 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1749 transitions. [2022-03-15 15:56:20,198 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1749 transitions. Word has length 21 [2022-03-15 15:56:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:20,198 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1749 transitions. [2022-03-15 15:56:20,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1749 transitions. [2022-03-15 15:56:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:20,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:20,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:20,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:20,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 15:56:20,415 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1916574138, now seen corresponding path program 25 times [2022-03-15 15:56:20,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:20,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700930852] [2022-03-15 15:56:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:20,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:20,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:20,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700930852] [2022-03-15 15:56:20,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700930852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:20,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325896446] [2022-03-15 15:56:20,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:20,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:20,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:20,524 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:20,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 15:56:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:20,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:20,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-15 15:56:20,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-15 15:56:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:20,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:21,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 277 [2022-03-15 15:56:21,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:21,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 250 [2022-03-15 15:56:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:21,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325896446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:21,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:21,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 15:56:21,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699199132] [2022-03-15 15:56:21,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:21,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:56:21,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:56:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:21,512 INFO L87 Difference]: Start difference. First operand 546 states and 1749 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:22,199 INFO L93 Difference]: Finished difference Result 1185 states and 3570 transitions. [2022-03-15 15:56:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:22,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:22,201 INFO L225 Difference]: With dead ends: 1185 [2022-03-15 15:56:22,201 INFO L226 Difference]: Without dead ends: 1118 [2022-03-15 15:56:22,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:22,202 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 217 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:22,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 182 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-15 15:56:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 588. [2022-03-15 15:56:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.2964224872231687) internal successors, (1935), 587 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1935 transitions. [2022-03-15 15:56:22,212 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1935 transitions. Word has length 21 [2022-03-15 15:56:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:22,212 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1935 transitions. [2022-03-15 15:56:22,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1935 transitions. [2022-03-15 15:56:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:22,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:22,214 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:22,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 15:56:22,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-15 15:56:22,414 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash -704433576, now seen corresponding path program 26 times [2022-03-15 15:56:22,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:22,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475818545] [2022-03-15 15:56:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:22,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:22,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475818545] [2022-03-15 15:56:22,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475818545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:22,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381740167] [2022-03-15 15:56:22,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:22,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:22,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:22,585 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:22,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 15:56:22,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:22,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:22,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:22,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:22,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 231 [2022-03-15 15:56:23,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-15 15:56:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:23,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:23,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:23,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-03-15 15:56:23,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-15 15:56:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:23,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381740167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:23,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:23,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-03-15 15:56:23,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180133362] [2022-03-15 15:56:23,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:23,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:23,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:23,569 INFO L87 Difference]: Start difference. First operand 588 states and 1935 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:24,388 INFO L93 Difference]: Finished difference Result 1175 states and 3546 transitions. [2022-03-15 15:56:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:56:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:24,391 INFO L225 Difference]: With dead ends: 1175 [2022-03-15 15:56:24,392 INFO L226 Difference]: Without dead ends: 1087 [2022-03-15 15:56:24,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:56:24,392 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 222 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:24,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 229 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:56:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-03-15 15:56:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 541. [2022-03-15 15:56:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 3.238888888888889) internal successors, (1749), 540 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1749 transitions. [2022-03-15 15:56:24,405 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1749 transitions. Word has length 21 [2022-03-15 15:56:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:24,406 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1749 transitions. [2022-03-15 15:56:24,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1749 transitions. [2022-03-15 15:56:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:24,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:24,407 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:24,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:24,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:24,619 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1854422378, now seen corresponding path program 27 times [2022-03-15 15:56:24,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:24,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273257944] [2022-03-15 15:56:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:24,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:24,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273257944] [2022-03-15 15:56:24,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273257944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:24,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492164331] [2022-03-15 15:56:24,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:24,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:24,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:24,702 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:24,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 15:56:24,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:24,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:24,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:24,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 189 [2022-03-15 15:56:25,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 15:56:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:25,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:25,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 216 [2022-03-15 15:56:25,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:25,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 193 [2022-03-15 15:56:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:25,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492164331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:25,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:25,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:56:25,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128609147] [2022-03-15 15:56:25,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:25,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:25,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:25,637 INFO L87 Difference]: Start difference. First operand 541 states and 1749 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:25,874 INFO L93 Difference]: Finished difference Result 872 states and 2663 transitions. [2022-03-15 15:56:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:56:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:25,876 INFO L225 Difference]: With dead ends: 872 [2022-03-15 15:56:25,876 INFO L226 Difference]: Without dead ends: 792 [2022-03-15 15:56:25,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:25,876 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:25,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 119 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-15 15:56:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 493. [2022-03-15 15:56:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1930894308943087) internal successors, (1571), 492 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1571 transitions. [2022-03-15 15:56:25,884 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1571 transitions. Word has length 21 [2022-03-15 15:56:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:25,884 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1571 transitions. [2022-03-15 15:56:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1571 transitions. [2022-03-15 15:56:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:25,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:25,885 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:25,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:26,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:26,085 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash 216306962, now seen corresponding path program 28 times [2022-03-15 15:56:26,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:26,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161007668] [2022-03-15 15:56:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:26,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:26,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:26,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161007668] [2022-03-15 15:56:26,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161007668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:26,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848555533] [2022-03-15 15:56:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:26,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:26,177 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:26,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 15:56:26,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:26,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:26,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:26,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 15:56:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:26,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:26,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-03-15 15:56:26,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:26,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 15:56:26,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:26,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848555533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:26,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:26,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-15 15:56:26,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971403710] [2022-03-15 15:56:26,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:26,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:26,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:26,917 INFO L87 Difference]: Start difference. First operand 493 states and 1571 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:27,107 INFO L93 Difference]: Finished difference Result 698 states and 2178 transitions. [2022-03-15 15:56:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:27,109 INFO L225 Difference]: With dead ends: 698 [2022-03-15 15:56:27,109 INFO L226 Difference]: Without dead ends: 637 [2022-03-15 15:56:27,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:27,109 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:27,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 98 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-03-15 15:56:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 507. [2022-03-15 15:56:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.205533596837945) internal successors, (1622), 506 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1622 transitions. [2022-03-15 15:56:27,119 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1622 transitions. Word has length 21 [2022-03-15 15:56:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:27,119 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1622 transitions. [2022-03-15 15:56:27,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1622 transitions. [2022-03-15 15:56:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:27,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:27,120 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:27,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:27,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:27,342 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1391797606, now seen corresponding path program 29 times [2022-03-15 15:56:27,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:27,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558909602] [2022-03-15 15:56:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:27,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:27,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558909602] [2022-03-15 15:56:27,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558909602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:27,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218416222] [2022-03-15 15:56:27,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:27,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:27,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:27,439 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:27,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 15:56:27,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:56:27,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:27,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:27,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:27,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:27,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-03-15 15:56:27,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 170 [2022-03-15 15:56:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:27,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:28,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-03-15 15:56:28,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-15 15:56:28,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:28,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218416222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:28,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:28,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-15 15:56:28,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583528269] [2022-03-15 15:56:28,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:28,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:56:28,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:56:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:56:28,386 INFO L87 Difference]: Start difference. First operand 507 states and 1622 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:28,623 INFO L93 Difference]: Finished difference Result 736 states and 2283 transitions. [2022-03-15 15:56:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:28,625 INFO L225 Difference]: With dead ends: 736 [2022-03-15 15:56:28,625 INFO L226 Difference]: Without dead ends: 684 [2022-03-15 15:56:28,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:28,626 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:28,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 117 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 350 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-03-15 15:56:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-15 15:56:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 527. [2022-03-15 15:56:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.2395437262357416) internal successors, (1704), 526 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1704 transitions. [2022-03-15 15:56:28,636 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1704 transitions. Word has length 21 [2022-03-15 15:56:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:28,636 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1704 transitions. [2022-03-15 15:56:28,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1704 transitions. [2022-03-15 15:56:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:28,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:28,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:28,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:28,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 15:56:28,860 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1289602956, now seen corresponding path program 30 times [2022-03-15 15:56:28,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:28,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762295489] [2022-03-15 15:56:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:29,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:29,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762295489] [2022-03-15 15:56:29,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762295489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:29,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455874157] [2022-03-15 15:56:29,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:29,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:29,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:29,001 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:29,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 15:56:29,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:29,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:29,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:29,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:29,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 239 [2022-03-15 15:56:29,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-03-15 15:56:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:29,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:29,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-03-15 15:56:30,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:30,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 15:56:30,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:30,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455874157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:30,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:30,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-03-15 15:56:30,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529368103] [2022-03-15 15:56:30,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:30,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:56:30,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:56:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:30,055 INFO L87 Difference]: Start difference. First operand 527 states and 1704 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:30,919 INFO L93 Difference]: Finished difference Result 848 states and 2576 transitions. [2022-03-15 15:56:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:56:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:30,921 INFO L225 Difference]: With dead ends: 848 [2022-03-15 15:56:30,921 INFO L226 Difference]: Without dead ends: 668 [2022-03-15 15:56:30,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:56:30,922 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:30,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 258 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 627 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-03-15 15:56:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-15 15:56:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 528. [2022-03-15 15:56:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.2485768500948766) internal successors, (1712), 527 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1712 transitions. [2022-03-15 15:56:30,930 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1712 transitions. Word has length 21 [2022-03-15 15:56:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:30,931 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1712 transitions. [2022-03-15 15:56:30,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1712 transitions. [2022-03-15 15:56:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:30,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:30,932 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:30,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 15:56:31,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 15:56:31,132 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash -822698094, now seen corresponding path program 31 times [2022-03-15 15:56:31,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:31,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440725513] [2022-03-15 15:56:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:31,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:31,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:31,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440725513] [2022-03-15 15:56:31,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440725513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:31,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122655139] [2022-03-15 15:56:31,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:31,244 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:31,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 15:56:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:31,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 245 [2022-03-15 15:56:31,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:31,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-15 15:56:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:31,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:31,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:31,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:31,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 187 [2022-03-15 15:56:31,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 162 [2022-03-15 15:56:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:32,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122655139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:32,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:32,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-15 15:56:32,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680029192] [2022-03-15 15:56:32,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:32,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:56:32,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:56:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:32,282 INFO L87 Difference]: Start difference. First operand 528 states and 1712 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:32,557 INFO L93 Difference]: Finished difference Result 756 states and 2364 transitions. [2022-03-15 15:56:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:56:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:32,560 INFO L225 Difference]: With dead ends: 756 [2022-03-15 15:56:32,560 INFO L226 Difference]: Without dead ends: 704 [2022-03-15 15:56:32,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:56:32,560 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 111 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:32,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 101 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-15 15:56:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 534. [2022-03-15 15:56:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.2664165103189493) internal successors, (1741), 533 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1741 transitions. [2022-03-15 15:56:32,570 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1741 transitions. Word has length 21 [2022-03-15 15:56:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1741 transitions. [2022-03-15 15:56:32,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1741 transitions. [2022-03-15 15:56:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:32,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:32,572 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:32,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:32,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 15:56:32,794 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:32,795 INFO L85 PathProgramCache]: Analyzing trace with hash 790868640, now seen corresponding path program 32 times [2022-03-15 15:56:32,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:32,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774803346] [2022-03-15 15:56:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:32,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:32,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774803346] [2022-03-15 15:56:32,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774803346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:32,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652746295] [2022-03-15 15:56:32,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:32,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:32,879 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:32,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 15:56:32,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:32,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:32,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:32,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:33,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 15:56:33,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-15 15:56:33,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:33,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:33,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:33,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:33,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 219 [2022-03-15 15:56:33,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 190 [2022-03-15 15:56:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:33,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652746295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:33,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:33,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-15 15:56:33,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92795401] [2022-03-15 15:56:33,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:33,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:33,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:33,847 INFO L87 Difference]: Start difference. First operand 534 states and 1741 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:34,080 INFO L93 Difference]: Finished difference Result 749 states and 2303 transitions. [2022-03-15 15:56:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:34,082 INFO L225 Difference]: With dead ends: 749 [2022-03-15 15:56:34,082 INFO L226 Difference]: Without dead ends: 694 [2022-03-15 15:56:34,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:34,083 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:34,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-15 15:56:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 530. [2022-03-15 15:56:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.2457466918714557) internal successors, (1717), 529 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1717 transitions. [2022-03-15 15:56:34,090 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1717 transitions. Word has length 21 [2022-03-15 15:56:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:34,091 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1717 transitions. [2022-03-15 15:56:34,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1717 transitions. [2022-03-15 15:56:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:34,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:34,092 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:34,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 15:56:34,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-15 15:56:34,297 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:34,297 INFO L85 PathProgramCache]: Analyzing trace with hash -728170158, now seen corresponding path program 33 times [2022-03-15 15:56:34,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:34,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817550504] [2022-03-15 15:56:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:34,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:34,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:34,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817550504] [2022-03-15 15:56:34,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817550504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:34,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089766447] [2022-03-15 15:56:34,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:34,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:34,389 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:34,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 15:56:34,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:56:34,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:34,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:34,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 236 [2022-03-15 15:56:34,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-15 15:56:34,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:35,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:35,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:35,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:35,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 187 [2022-03-15 15:56:35,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 162 [2022-03-15 15:56:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:35,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089766447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:35,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:35,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-15 15:56:35,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801512918] [2022-03-15 15:56:35,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:35,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:56:35,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:56:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:56:35,588 INFO L87 Difference]: Start difference. First operand 530 states and 1717 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:35,850 INFO L93 Difference]: Finished difference Result 650 states and 2036 transitions. [2022-03-15 15:56:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:56:35,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:35,852 INFO L225 Difference]: With dead ends: 650 [2022-03-15 15:56:35,852 INFO L226 Difference]: Without dead ends: 577 [2022-03-15 15:56:35,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:35,853 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:35,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 110 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-03-15 15:56:35,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 512. [2022-03-15 15:56:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.2407045009784734) internal successors, (1656), 511 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1656 transitions. [2022-03-15 15:56:35,861 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1656 transitions. Word has length 21 [2022-03-15 15:56:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:35,861 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1656 transitions. [2022-03-15 15:56:35,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1656 transitions. [2022-03-15 15:56:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:35,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:35,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:35,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:36,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:36,062 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:36,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash 108651494, now seen corresponding path program 34 times [2022-03-15 15:56:36,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:36,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995138410] [2022-03-15 15:56:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:36,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:36,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:36,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995138410] [2022-03-15 15:56:36,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995138410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:36,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881109803] [2022-03-15 15:56:36,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:36,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:36,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:36,158 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:36,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 15:56:36,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:36,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:36,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:36,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:36,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:36,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 237 [2022-03-15 15:56:36,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 205 [2022-03-15 15:56:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:36,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:36,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-03-15 15:56:37,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:37,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 15:56:37,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:37,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881109803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:37,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:37,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-15 15:56:37,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863041079] [2022-03-15 15:56:37,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:37,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:56:37,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:56:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:37,209 INFO L87 Difference]: Start difference. First operand 512 states and 1656 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:37,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:37,414 INFO L93 Difference]: Finished difference Result 737 states and 2299 transitions. [2022-03-15 15:56:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:37,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:37,417 INFO L225 Difference]: With dead ends: 737 [2022-03-15 15:56:37,417 INFO L226 Difference]: Without dead ends: 693 [2022-03-15 15:56:37,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:56:37,417 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:37,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 129 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-03-15 15:56:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 513. [2022-03-15 15:56:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.24609375) internal successors, (1662), 512 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1662 transitions. [2022-03-15 15:56:37,428 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1662 transitions. Word has length 21 [2022-03-15 15:56:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:37,428 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1662 transitions. [2022-03-15 15:56:37,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1662 transitions. [2022-03-15 15:56:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:37,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:37,429 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:37,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:37,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 15:56:37,651 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1722218228, now seen corresponding path program 35 times [2022-03-15 15:56:37,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:37,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135176341] [2022-03-15 15:56:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:37,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:37,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135176341] [2022-03-15 15:56:37,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135176341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:37,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739149676] [2022-03-15 15:56:37,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:37,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:37,731 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:37,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 15:56:37,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:37,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:37,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 151 [2022-03-15 15:56:37,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-03-15 15:56:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:38,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:38,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-03-15 15:56:38,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:38,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 15:56:38,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:38,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739149676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:38,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:38,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-15 15:56:38,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954682545] [2022-03-15 15:56:38,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:38,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:38,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:38,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:38,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:38,643 INFO L87 Difference]: Start difference. First operand 513 states and 1662 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:38,839 INFO L93 Difference]: Finished difference Result 653 states and 2037 transitions. [2022-03-15 15:56:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:56:38,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:38,842 INFO L225 Difference]: With dead ends: 653 [2022-03-15 15:56:38,842 INFO L226 Difference]: Without dead ends: 606 [2022-03-15 15:56:38,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:38,842 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:38,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 122 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-03-15 15:56:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 482. [2022-03-15 15:56:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.191268191268191) internal successors, (1535), 481 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1535 transitions. [2022-03-15 15:56:38,852 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1535 transitions. Word has length 21 [2022-03-15 15:56:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:38,852 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1535 transitions. [2022-03-15 15:56:38,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1535 transitions. [2022-03-15 15:56:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:38,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:38,853 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:38,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:39,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:39,075 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2061815264, now seen corresponding path program 36 times [2022-03-15 15:56:39,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:39,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909828561] [2022-03-15 15:56:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:39,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:39,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909828561] [2022-03-15 15:56:39,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909828561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:39,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660506353] [2022-03-15 15:56:39,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:39,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:39,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:39,238 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:39,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 15:56:39,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:39,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:39,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:39,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 129 [2022-03-15 15:56:39,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:56:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:39,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:39,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 224 [2022-03-15 15:56:39,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:39,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 213 [2022-03-15 15:56:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:40,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660506353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:40,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:40,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-15 15:56:40,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148195258] [2022-03-15 15:56:40,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:40,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:56:40,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:40,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:56:40,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:56:40,161 INFO L87 Difference]: Start difference. First operand 482 states and 1535 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:41,123 INFO L93 Difference]: Finished difference Result 1121 states and 3394 transitions. [2022-03-15 15:56:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 15:56:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:41,125 INFO L225 Difference]: With dead ends: 1121 [2022-03-15 15:56:41,125 INFO L226 Difference]: Without dead ends: 970 [2022-03-15 15:56:41,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:56:41,126 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 205 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:41,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 330 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:56:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-03-15 15:56:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 515. [2022-03-15 15:56:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.2392996108949417) internal successors, (1665), 514 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1665 transitions. [2022-03-15 15:56:41,134 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1665 transitions. Word has length 21 [2022-03-15 15:56:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:41,134 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1665 transitions. [2022-03-15 15:56:41,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1665 transitions. [2022-03-15 15:56:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:41,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:41,136 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:41,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:41,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:41,355 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 921136774, now seen corresponding path program 37 times [2022-03-15 15:56:41,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:41,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263623810] [2022-03-15 15:56:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:41,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:41,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:41,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263623810] [2022-03-15 15:56:41,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263623810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:41,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663363519] [2022-03-15 15:56:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:41,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:41,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:41,444 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:41,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 15:56:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:41,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:41,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 15:56:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:41,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:41,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 296 [2022-03-15 15:56:42,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:42,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 15:56:42,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:42,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663363519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:42,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:42,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 15:56:42,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122430601] [2022-03-15 15:56:42,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:42,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:56:42,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:56:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:56:42,304 INFO L87 Difference]: Start difference. First operand 515 states and 1665 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:42,470 INFO L93 Difference]: Finished difference Result 637 states and 2034 transitions. [2022-03-15 15:56:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:56:42,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:42,472 INFO L225 Difference]: With dead ends: 637 [2022-03-15 15:56:42,472 INFO L226 Difference]: Without dead ends: 576 [2022-03-15 15:56:42,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:42,473 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:42,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 107 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-03-15 15:56:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 488. [2022-03-15 15:56:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.240246406570842) internal successors, (1578), 487 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1578 transitions. [2022-03-15 15:56:42,482 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1578 transitions. Word has length 21 [2022-03-15 15:56:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:42,482 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1578 transitions. [2022-03-15 15:56:42,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1578 transitions. [2022-03-15 15:56:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:42,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:42,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:42,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:42,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 15:56:42,706 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2096627418, now seen corresponding path program 38 times [2022-03-15 15:56:42,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:42,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361192461] [2022-03-15 15:56:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:42,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:42,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:42,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361192461] [2022-03-15 15:56:42,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361192461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:42,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072577888] [2022-03-15 15:56:42,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:42,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:42,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:42,783 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:42,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 15:56:42,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:42,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:42,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:42,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:43,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-03-15 15:56:43,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 173 [2022-03-15 15:56:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:43,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:43,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-03-15 15:56:43,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:43,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 15:56:43,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:43,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072577888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:43,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:43,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:56:43,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574207366] [2022-03-15 15:56:43,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:43,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:43,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:43,710 INFO L87 Difference]: Start difference. First operand 488 states and 1578 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:43,816 INFO L93 Difference]: Finished difference Result 727 states and 2279 transitions. [2022-03-15 15:56:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:56:43,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:43,818 INFO L225 Difference]: With dead ends: 727 [2022-03-15 15:56:43,818 INFO L226 Difference]: Without dead ends: 675 [2022-03-15 15:56:43,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:43,818 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:43,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 66 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-15 15:56:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 490. [2022-03-15 15:56:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.2372188139059306) internal successors, (1583), 489 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1583 transitions. [2022-03-15 15:56:43,828 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1583 transitions. Word has length 21 [2022-03-15 15:56:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:43,829 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1583 transitions. [2022-03-15 15:56:43,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1583 transitions. [2022-03-15 15:56:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:43,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:43,830 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:43,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:44,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-15 15:56:44,043 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -584773144, now seen corresponding path program 39 times [2022-03-15 15:56:44,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:44,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397900669] [2022-03-15 15:56:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:44,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:44,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:44,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397900669] [2022-03-15 15:56:44,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397900669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:44,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113110802] [2022-03-15 15:56:44,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:44,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:44,128 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:44,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 15:56:44,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:44,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:44,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:44,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-15 15:56:44,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-03-15 15:56:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:44,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:44,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-03-15 15:56:44,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:44,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 15:56:44,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:44,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113110802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:44,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:44,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:56:44,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174322996] [2022-03-15 15:56:44,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:44,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:44,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:44,924 INFO L87 Difference]: Start difference. First operand 490 states and 1583 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:45,037 INFO L93 Difference]: Finished difference Result 611 states and 1920 transitions. [2022-03-15 15:56:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:56:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:45,039 INFO L225 Difference]: With dead ends: 611 [2022-03-15 15:56:45,039 INFO L226 Difference]: Without dead ends: 554 [2022-03-15 15:56:45,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:56:45,039 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:45,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 61 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-03-15 15:56:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 463. [2022-03-15 15:56:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1818181818181817) internal successors, (1470), 462 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1470 transitions. [2022-03-15 15:56:45,047 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1470 transitions. Word has length 21 [2022-03-15 15:56:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:45,047 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1470 transitions. [2022-03-15 15:56:45,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1470 transitions. [2022-03-15 15:56:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:45,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:45,048 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:45,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:45,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-15 15:56:45,263 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1917216036, now seen corresponding path program 40 times [2022-03-15 15:56:45,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:45,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059539282] [2022-03-15 15:56:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:45,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:45,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:45,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059539282] [2022-03-15 15:56:45,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059539282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:45,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119058696] [2022-03-15 15:56:45,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:45,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:45,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:45,335 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:45,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 15:56:45,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:45,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:45,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:45,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 15:56:45,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-15 15:56:45,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:56:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:45,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:45,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:56:45,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:45,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 221 [2022-03-15 15:56:45,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 192 [2022-03-15 15:56:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:46,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119058696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:46,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:46,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:56:46,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319070367] [2022-03-15 15:56:46,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:46,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:46,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:46,236 INFO L87 Difference]: Start difference. First operand 463 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:46,394 INFO L93 Difference]: Finished difference Result 616 states and 1877 transitions. [2022-03-15 15:56:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:56:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:46,395 INFO L225 Difference]: With dead ends: 616 [2022-03-15 15:56:46,395 INFO L226 Difference]: Without dead ends: 550 [2022-03-15 15:56:46,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:46,396 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:46,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 96 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-15 15:56:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 422. [2022-03-15 15:56:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0688836104513064) internal successors, (1292), 421 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1292 transitions. [2022-03-15 15:56:46,402 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1292 transitions. Word has length 21 [2022-03-15 15:56:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:46,402 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1292 transitions. [2022-03-15 15:56:46,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1292 transitions. [2022-03-15 15:56:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:46,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:46,403 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:46,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:46,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 15:56:46,604 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:46,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1518990988, now seen corresponding path program 41 times [2022-03-15 15:56:46,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:46,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471854508] [2022-03-15 15:56:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:56:46,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:46,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471854508] [2022-03-15 15:56:46,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471854508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:46,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89259877] [2022-03-15 15:56:46,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:46,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:46,696 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:46,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 15:56:46,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:46,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:46,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 184 [2022-03-15 15:56:47,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-15 15:56:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:47,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:47,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-03-15 15:56:47,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 188 [2022-03-15 15:56:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:47,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89259877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:47,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:47,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:56:47,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873901084] [2022-03-15 15:56:47,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:47,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:56:47,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:47,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:56:47,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:47,554 INFO L87 Difference]: Start difference. First operand 422 states and 1292 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:48,828 INFO L93 Difference]: Finished difference Result 870 states and 2496 transitions. [2022-03-15 15:56:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:56:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:48,830 INFO L225 Difference]: With dead ends: 870 [2022-03-15 15:56:48,830 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 15:56:48,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=1622, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:56:48,830 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 172 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:48,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 423 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 15:56:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 15:56:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 406. [2022-03-15 15:56:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.0320987654320986) internal successors, (1228), 405 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1228 transitions. [2022-03-15 15:56:48,839 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1228 transitions. Word has length 21 [2022-03-15 15:56:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:48,839 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1228 transitions. [2022-03-15 15:56:48,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1228 transitions. [2022-03-15 15:56:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:48,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:48,841 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:48,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:49,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:49,063 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:49,064 INFO L85 PathProgramCache]: Analyzing trace with hash 928205818, now seen corresponding path program 42 times [2022-03-15 15:56:49,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:49,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276045146] [2022-03-15 15:56:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:49,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:49,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276045146] [2022-03-15 15:56:49,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276045146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:49,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789330395] [2022-03-15 15:56:49,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:49,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:49,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:49,160 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:49,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 15:56:49,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:56:49,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:49,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:49,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:49,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 127 [2022-03-15 15:56:49,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-15 15:56:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:49,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 210 [2022-03-15 15:56:49,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:49,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789330395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:49,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:49,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:56:49,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199675465] [2022-03-15 15:56:49,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:49,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:56:49,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:56:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:49,985 INFO L87 Difference]: Start difference. First operand 406 states and 1228 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:50,128 INFO L93 Difference]: Finished difference Result 541 states and 1632 transitions. [2022-03-15 15:56:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:56:50,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:50,129 INFO L225 Difference]: With dead ends: 541 [2022-03-15 15:56:50,129 INFO L226 Difference]: Without dead ends: 495 [2022-03-15 15:56:50,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:50,130 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:50,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 332 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-03-15 15:56:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-15 15:56:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 432. [2022-03-15 15:56:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.046403712296984) internal successors, (1313), 431 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1313 transitions. [2022-03-15 15:56:50,136 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1313 transitions. Word has length 21 [2022-03-15 15:56:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:50,136 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1313 transitions. [2022-03-15 15:56:50,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1313 transitions. [2022-03-15 15:56:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:50,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:50,136 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:50,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 15:56:50,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-15 15:56:50,345 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 793518806, now seen corresponding path program 43 times [2022-03-15 15:56:50,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:50,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987518650] [2022-03-15 15:56:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:50,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987518650] [2022-03-15 15:56:50,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987518650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:50,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715860142] [2022-03-15 15:56:50,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:50,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:50,432 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:50,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 15:56:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:50,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:50,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:50,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2022-03-15 15:56:50,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-03-15 15:56:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:51,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 210 [2022-03-15 15:56:51,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:51,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:51,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715860142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:51,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:51,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:56:51,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486361398] [2022-03-15 15:56:51,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:51,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:56:51,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:56:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:56:51,353 INFO L87 Difference]: Start difference. First operand 432 states and 1313 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:51,518 INFO L93 Difference]: Finished difference Result 599 states and 1761 transitions. [2022-03-15 15:56:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:56:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:51,519 INFO L225 Difference]: With dead ends: 599 [2022-03-15 15:56:51,519 INFO L226 Difference]: Without dead ends: 538 [2022-03-15 15:56:51,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:51,519 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:51,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 96 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 15:56:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-15 15:56:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 443. [2022-03-15 15:56:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.0565610859728505) internal successors, (1351), 442 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1351 transitions. [2022-03-15 15:56:51,526 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1351 transitions. Word has length 21 [2022-03-15 15:56:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:51,526 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1351 transitions. [2022-03-15 15:56:51,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1351 transitions. [2022-03-15 15:56:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:51,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:51,527 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:51,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 15:56:51,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:51,745 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1146658296, now seen corresponding path program 44 times [2022-03-15 15:56:51,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:51,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993168299] [2022-03-15 15:56:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:51,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:51,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993168299] [2022-03-15 15:56:51,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993168299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:51,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143747934] [2022-03-15 15:56:51,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:51,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:51,886 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:51,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 15:56:51,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:51,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:52,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 357 treesize of output 299 [2022-03-15 15:56:52,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:52,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 275 [2022-03-15 15:56:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:52,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 231 [2022-03-15 15:56:53,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:53,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:56:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:53,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143747934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:53,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:53,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-15 15:56:53,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119559965] [2022-03-15 15:56:53,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:53,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:56:53,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:56:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:53,118 INFO L87 Difference]: Start difference. First operand 443 states and 1351 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:53,937 INFO L93 Difference]: Finished difference Result 1033 states and 3018 transitions. [2022-03-15 15:56:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:56:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:53,939 INFO L225 Difference]: With dead ends: 1033 [2022-03-15 15:56:53,939 INFO L226 Difference]: Without dead ends: 959 [2022-03-15 15:56:53,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:53,939 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:53,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 274 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:56:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-15 15:56:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 459. [2022-03-15 15:56:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1222707423580784) internal successors, (1430), 458 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1430 transitions. [2022-03-15 15:56:53,947 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1430 transitions. Word has length 21 [2022-03-15 15:56:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:53,947 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1430 transitions. [2022-03-15 15:56:53,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1430 transitions. [2022-03-15 15:56:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:53,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:53,948 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:53,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 15:56:54,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-15 15:56:54,149 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 155990242, now seen corresponding path program 45 times [2022-03-15 15:56:54,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:54,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006659816] [2022-03-15 15:56:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:54,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:54,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006659816] [2022-03-15 15:56:54,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006659816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:54,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159848888] [2022-03-15 15:56:54,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:54,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:54,236 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:54,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 15:56:54,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:54,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:54,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:54,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 143 [2022-03-15 15:56:54,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-15 15:56:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:54,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:54,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-03-15 15:56:54,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:54,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-03-15 15:56:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159848888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:55,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:55,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:56:55,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435644078] [2022-03-15 15:56:55,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:55,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:56:55,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:56:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:55,032 INFO L87 Difference]: Start difference. First operand 459 states and 1430 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:55,168 INFO L93 Difference]: Finished difference Result 579 states and 1773 transitions. [2022-03-15 15:56:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:55,169 INFO L225 Difference]: With dead ends: 579 [2022-03-15 15:56:55,169 INFO L226 Difference]: Without dead ends: 511 [2022-03-15 15:56:55,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:55,169 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:55,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 140 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-03-15 15:56:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-15 15:56:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2022-03-15 15:56:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1164835164835165) internal successors, (1418), 455 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1418 transitions. [2022-03-15 15:56:55,176 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1418 transitions. Word has length 21 [2022-03-15 15:56:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:55,176 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1418 transitions. [2022-03-15 15:56:55,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1418 transitions. [2022-03-15 15:56:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:55,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:55,177 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:55,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:55,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:55,378 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash 283941334, now seen corresponding path program 46 times [2022-03-15 15:56:55,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:55,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182641020] [2022-03-15 15:56:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:55,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182641020] [2022-03-15 15:56:55,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182641020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:55,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095027581] [2022-03-15 15:56:55,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:55,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:55,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:55,455 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:55,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 15:56:55,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:55,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:55,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:55,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 189 [2022-03-15 15:56:55,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-15 15:56:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:55,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 148 [2022-03-15 15:56:56,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:56,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-03-15 15:56:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:56,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095027581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:56,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:56,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:56:56,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640864923] [2022-03-15 15:56:56,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:56,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:56:56,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:56:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:56:56,256 INFO L87 Difference]: Start difference. First operand 456 states and 1418 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:56,402 INFO L93 Difference]: Finished difference Result 587 states and 1803 transitions. [2022-03-15 15:56:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:56:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:56,403 INFO L225 Difference]: With dead ends: 587 [2022-03-15 15:56:56,403 INFO L226 Difference]: Without dead ends: 551 [2022-03-15 15:56:56,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:56,404 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:56,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 109 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 327 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-03-15 15:56:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-15 15:56:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 454. [2022-03-15 15:56:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1147902869757176) internal successors, (1411), 453 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1411 transitions. [2022-03-15 15:56:56,410 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1411 transitions. Word has length 21 [2022-03-15 15:56:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:56,410 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1411 transitions. [2022-03-15 15:56:56,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1411 transitions. [2022-03-15 15:56:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:56:56,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:56,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:56,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 15:56:56,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:56,612 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:56,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1340912374, now seen corresponding path program 47 times [2022-03-15 15:56:56,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:56,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934035016] [2022-03-15 15:56:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:56,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:56,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:56,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934035016] [2022-03-15 15:56:56,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934035016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:56,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49233671] [2022-03-15 15:56:56,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:56,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:56,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:56,705 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:56,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 15:56:56,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:56,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:56,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 15:56:56,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:56,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-03-15 15:56:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:57,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 254 [2022-03-15 15:56:57,415 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:56:57,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:56:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:57,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49233671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:57,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:57,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:56:57,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256525727] [2022-03-15 15:56:57,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:57,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:56:57,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:56:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:56:57,421 INFO L87 Difference]: Start difference. First operand 454 states and 1411 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:58,185 INFO L93 Difference]: Finished difference Result 836 states and 2549 transitions. [2022-03-15 15:56:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 15:56:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:56:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:58,186 INFO L225 Difference]: With dead ends: 836 [2022-03-15 15:56:58,186 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 15:56:58,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:56:58,187 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 131 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:58,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 235 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:56:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 15:56:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 428. [2022-03-15 15:56:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.070257611241218) internal successors, (1311), 427 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1311 transitions. [2022-03-15 15:56:58,195 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1311 transitions. Word has length 21 [2022-03-15 15:56:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:58,195 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1311 transitions. [2022-03-15 15:56:58,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1311 transitions. [2022-03-15 15:56:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:56:58,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:58,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:58,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-15 15:56:58,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 15:56:58,403 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -520581084, now seen corresponding path program 48 times [2022-03-15 15:56:58,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:58,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697134778] [2022-03-15 15:56:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:58,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:58,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697134778] [2022-03-15 15:56:58,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697134778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:58,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088891841] [2022-03-15 15:56:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:58,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:58,472 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:58,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 15:56:58,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:58,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:58,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:56:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:58,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:56:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:58,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:58,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:58,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:56:58,847 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:56:58,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:56:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:58,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088891841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:58,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:58,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-15 15:56:58,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383630761] [2022-03-15 15:56:58,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:58,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:56:58,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:56:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:56:58,850 INFO L87 Difference]: Start difference. First operand 428 states and 1311 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:59,748 INFO L93 Difference]: Finished difference Result 846 states and 2421 transitions. [2022-03-15 15:56:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:56:59,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:56:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:59,750 INFO L225 Difference]: With dead ends: 846 [2022-03-15 15:56:59,750 INFO L226 Difference]: Without dead ends: 776 [2022-03-15 15:56:59,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=1915, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:56:59,750 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:59,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 409 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:56:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-15 15:56:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 413. [2022-03-15 15:56:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0436893203883497) internal successors, (1254), 412 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1254 transitions. [2022-03-15 15:56:59,756 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1254 transitions. Word has length 22 [2022-03-15 15:56:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:59,757 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1254 transitions. [2022-03-15 15:56:59,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1254 transitions. [2022-03-15 15:56:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:56:59,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:59,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:59,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:59,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 15:56:59,958 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:56:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -780260828, now seen corresponding path program 49 times [2022-03-15 15:56:59,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:59,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955237438] [2022-03-15 15:56:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:00,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:00,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955237438] [2022-03-15 15:57:00,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955237438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:00,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301102998] [2022-03-15 15:57:00,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:00,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:00,026 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:00,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 15:57:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:57:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:00,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:57:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:00,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:00,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:00,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:57:00,468 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:00,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:00,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301102998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:00,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:00,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-15 15:57:00,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772584365] [2022-03-15 15:57:00,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:00,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:57:00,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:57:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:00,471 INFO L87 Difference]: Start difference. First operand 413 states and 1254 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:01,283 INFO L93 Difference]: Finished difference Result 851 states and 2463 transitions. [2022-03-15 15:57:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:57:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:01,285 INFO L225 Difference]: With dead ends: 851 [2022-03-15 15:57:01,285 INFO L226 Difference]: Without dead ends: 787 [2022-03-15 15:57:01,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:57:01,286 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 132 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:01,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 474 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 15:57:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-03-15 15:57:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 385. [2022-03-15 15:57:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0026041666666665) internal successors, (1153), 384 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1153 transitions. [2022-03-15 15:57:01,297 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1153 transitions. Word has length 22 [2022-03-15 15:57:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:01,298 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1153 transitions. [2022-03-15 15:57:01,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1153 transitions. [2022-03-15 15:57:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:01,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:01,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:01,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 15:57:01,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 15:57:01,499 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1638622410, now seen corresponding path program 50 times [2022-03-15 15:57:01,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:01,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682019759] [2022-03-15 15:57:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:01,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:01,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682019759] [2022-03-15 15:57:01,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682019759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:01,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353668886] [2022-03-15 15:57:01,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:01,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:01,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:01,575 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:01,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 15:57:01,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:01,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:57:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:01,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:57:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:01,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:01,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:01,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:57:01,953 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:01,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:01,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353668886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:01,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:01,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-15 15:57:01,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629158402] [2022-03-15 15:57:01,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:01,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:57:01,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:01,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:57:01,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:01,959 INFO L87 Difference]: Start difference. First operand 385 states and 1153 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:03,157 INFO L93 Difference]: Finished difference Result 900 states and 2592 transitions. [2022-03-15 15:57:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:57:03,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:03,158 INFO L225 Difference]: With dead ends: 900 [2022-03-15 15:57:03,158 INFO L226 Difference]: Without dead ends: 830 [2022-03-15 15:57:03,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=2218, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:57:03,159 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 202 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:03,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 584 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:57:03,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-15 15:57:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 396. [2022-03-15 15:57:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.9949367088607595) internal successors, (1183), 395 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1183 transitions. [2022-03-15 15:57:03,166 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1183 transitions. Word has length 22 [2022-03-15 15:57:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:03,166 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1183 transitions. [2022-03-15 15:57:03,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1183 transitions. [2022-03-15 15:57:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:03,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:03,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:03,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 15:57:03,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 15:57:03,367 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1991761900, now seen corresponding path program 51 times [2022-03-15 15:57:03,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:03,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555545270] [2022-03-15 15:57:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:03,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:03,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:03,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555545270] [2022-03-15 15:57:03,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555545270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:03,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778897959] [2022-03-15 15:57:03,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:03,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:03,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:03,448 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:03,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 15:57:03,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:57:03,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:03,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:57:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:03,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:57:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:03,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:03,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:57:03,890 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:03,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778897959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:03,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:03,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-03-15 15:57:03,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869090084] [2022-03-15 15:57:03,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:03,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:03,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:03,894 INFO L87 Difference]: Start difference. First operand 396 states and 1183 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:05,140 INFO L93 Difference]: Finished difference Result 894 states and 2573 transitions. [2022-03-15 15:57:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 15:57:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:05,142 INFO L225 Difference]: With dead ends: 894 [2022-03-15 15:57:05,142 INFO L226 Difference]: Without dead ends: 848 [2022-03-15 15:57:05,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=511, Invalid=2351, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:57:05,143 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 167 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:05,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 644 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:57:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-15 15:57:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 378. [2022-03-15 15:57:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.973474801061008) internal successors, (1121), 377 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1121 transitions. [2022-03-15 15:57:05,151 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1121 transitions. Word has length 22 [2022-03-15 15:57:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:05,151 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1121 transitions. [2022-03-15 15:57:05,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1121 transitions. [2022-03-15 15:57:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:05,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:05,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:05,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:05,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 15:57:05,367 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1817911674, now seen corresponding path program 52 times [2022-03-15 15:57:05,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:05,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231801739] [2022-03-15 15:57:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:05,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:05,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231801739] [2022-03-15 15:57:05,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231801739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:05,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422135360] [2022-03-15 15:57:05,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:05,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:05,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:05,423 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:05,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 15:57:05,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:05,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:05,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:57:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:05,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:05,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:05,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:57:05,812 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:05,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:05,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422135360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:05,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:05,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-15 15:57:05,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379958195] [2022-03-15 15:57:05,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:05,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:57:05,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:57:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:05,816 INFO L87 Difference]: Start difference. First operand 378 states and 1121 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:06,845 INFO L93 Difference]: Finished difference Result 726 states and 2091 transitions. [2022-03-15 15:57:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:57:06,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:06,847 INFO L225 Difference]: With dead ends: 726 [2022-03-15 15:57:06,847 INFO L226 Difference]: Without dead ends: 680 [2022-03-15 15:57:06,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:57:06,847 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 153 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:06,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 591 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 15:57:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-03-15 15:57:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 311. [2022-03-15 15:57:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9161290322580644) internal successors, (904), 310 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 904 transitions. [2022-03-15 15:57:06,852 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 904 transitions. Word has length 22 [2022-03-15 15:57:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:06,852 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 904 transitions. [2022-03-15 15:57:06,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 904 transitions. [2022-03-15 15:57:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:06,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:06,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:06,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 15:57:07,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:07,053 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:07,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1282730021, now seen corresponding path program 53 times [2022-03-15 15:57:07,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:07,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882846522] [2022-03-15 15:57:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:07,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:57:07,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:07,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882846522] [2022-03-15 15:57:07,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882846522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:07,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025761369] [2022-03-15 15:57:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:07,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:07,143 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:07,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 15:57:07,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:07,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:07,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:07,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:07,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:57:07,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:07,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:57:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:07,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:07,791 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:07,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:07,876 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:07,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-15 15:57:07,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-03-15 15:57:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:07,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025761369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:07,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:07,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-03-15 15:57:07,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653053662] [2022-03-15 15:57:07,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:07,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:07,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:07,931 INFO L87 Difference]: Start difference. First operand 311 states and 904 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:08,762 INFO L93 Difference]: Finished difference Result 842 states and 2401 transitions. [2022-03-15 15:57:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:57:08,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:08,763 INFO L225 Difference]: With dead ends: 842 [2022-03-15 15:57:08,763 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 15:57:08,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:57:08,763 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 235 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:08,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 241 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 15:57:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 338. [2022-03-15 15:57:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0089020771513355) internal successors, (1014), 337 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1014 transitions. [2022-03-15 15:57:08,768 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1014 transitions. Word has length 22 [2022-03-15 15:57:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:08,769 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1014 transitions. [2022-03-15 15:57:08,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1014 transitions. [2022-03-15 15:57:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:08,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:08,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:08,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 15:57:08,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:08,970 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 443034195, now seen corresponding path program 54 times [2022-03-15 15:57:08,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:08,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468147836] [2022-03-15 15:57:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:09,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:09,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468147836] [2022-03-15 15:57:09,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468147836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:09,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049249696] [2022-03-15 15:57:09,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:09,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:09,100 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:09,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 15:57:09,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:09,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:09,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:09,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:57:09,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-15 15:57:09,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:57:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:09,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:09,734 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:09,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:09,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:09,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:09,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:09,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:09,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049249696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:09,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:09,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-15 15:57:09,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173598143] [2022-03-15 15:57:09,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:09,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:09,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:09,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:09,911 INFO L87 Difference]: Start difference. First operand 338 states and 1014 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:11,743 INFO L93 Difference]: Finished difference Result 906 states and 2539 transitions. [2022-03-15 15:57:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:57:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:11,744 INFO L225 Difference]: With dead ends: 906 [2022-03-15 15:57:11,744 INFO L226 Difference]: Without dead ends: 744 [2022-03-15 15:57:11,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:57:11,745 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 307 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:11,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 236 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:57:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-15 15:57:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 331. [2022-03-15 15:57:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2022-03-15 15:57:11,750 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2022-03-15 15:57:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:11,750 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2022-03-15 15:57:11,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2022-03-15 15:57:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:11,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:11,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:11,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 15:57:11,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:11,951 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:11,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1922553573, now seen corresponding path program 55 times [2022-03-15 15:57:11,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:11,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473705666] [2022-03-15 15:57:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:11,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:12,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:12,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473705666] [2022-03-15 15:57:12,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473705666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:12,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536044588] [2022-03-15 15:57:12,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:12,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:12,092 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:12,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 15:57:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:12,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:12,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:12,611 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:12,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:12,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:12,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:12,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:12,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:12,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536044588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:12,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:12,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-15 15:57:12,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768831645] [2022-03-15 15:57:12,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:12,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:12,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:12,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:12,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:12,809 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:13,674 INFO L93 Difference]: Finished difference Result 715 states and 2040 transitions. [2022-03-15 15:57:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:13,675 INFO L225 Difference]: With dead ends: 715 [2022-03-15 15:57:13,676 INFO L226 Difference]: Without dead ends: 575 [2022-03-15 15:57:13,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:57:13,676 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:13,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 187 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-15 15:57:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 324. [2022-03-15 15:57:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.959752321981424) internal successors, (956), 323 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 956 transitions. [2022-03-15 15:57:13,680 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 956 transitions. Word has length 22 [2022-03-15 15:57:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:13,681 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 956 transitions. [2022-03-15 15:57:13,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 956 transitions. [2022-03-15 15:57:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:13,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:13,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:13,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:13,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:13,882 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:13,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1403862611, now seen corresponding path program 56 times [2022-03-15 15:57:13,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:13,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199057033] [2022-03-15 15:57:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:13,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:13,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:13,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199057033] [2022-03-15 15:57:13,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199057033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:13,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472560878] [2022-03-15 15:57:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:13,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:13,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:13,974 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:13,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 15:57:14,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:14,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:14,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:14,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:14,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:14,613 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:14,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:14,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:14,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:14,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:14,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472560878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:14,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:14,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-15 15:57:14,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718912424] [2022-03-15 15:57:14,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:14,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:14,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:14,870 INFO L87 Difference]: Start difference. First operand 324 states and 956 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:16,316 INFO L93 Difference]: Finished difference Result 950 states and 2685 transitions. [2022-03-15 15:57:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:57:16,316 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:16,317 INFO L225 Difference]: With dead ends: 950 [2022-03-15 15:57:16,317 INFO L226 Difference]: Without dead ends: 698 [2022-03-15 15:57:16,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=465, Invalid=1605, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:57:16,318 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 256 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:16,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 331 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:57:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-15 15:57:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 324. [2022-03-15 15:57:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.931888544891641) internal successors, (947), 323 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 947 transitions. [2022-03-15 15:57:16,324 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 947 transitions. Word has length 22 [2022-03-15 15:57:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:16,325 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 947 transitions. [2022-03-15 15:57:16,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 947 transitions. [2022-03-15 15:57:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:16,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:16,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:16,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 15:57:16,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:16,548 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash 827673381, now seen corresponding path program 57 times [2022-03-15 15:57:16,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:16,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817871235] [2022-03-15 15:57:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:16,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:16,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:16,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817871235] [2022-03-15 15:57:16,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817871235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:16,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496523750] [2022-03-15 15:57:16,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:16,744 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:16,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 15:57:16,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:16,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:16,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:57:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:16,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 247 [2022-03-15 15:57:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:17,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:57:17,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:57:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:57:17,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:17,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:57:17,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 244 [2022-03-15 15:57:17,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:17,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 221 [2022-03-15 15:57:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:57:17,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496523750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:17,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:17,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-15 15:57:17,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053449099] [2022-03-15 15:57:17,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:17,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:17,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:17,998 INFO L87 Difference]: Start difference. First operand 324 states and 947 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:18,513 INFO L93 Difference]: Finished difference Result 924 states and 2663 transitions. [2022-03-15 15:57:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:57:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:18,514 INFO L225 Difference]: With dead ends: 924 [2022-03-15 15:57:18,514 INFO L226 Difference]: Without dead ends: 806 [2022-03-15 15:57:18,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:18,515 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 236 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:18,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 174 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 407 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-03-15 15:57:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-15 15:57:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 362. [2022-03-15 15:57:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0304709141274238) internal successors, (1094), 361 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1094 transitions. [2022-03-15 15:57:18,521 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1094 transitions. Word has length 22 [2022-03-15 15:57:18,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:18,521 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1094 transitions. [2022-03-15 15:57:18,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1094 transitions. [2022-03-15 15:57:18,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:18,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:18,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:18,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 15:57:18,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 15:57:18,722 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash -12022445, now seen corresponding path program 58 times [2022-03-15 15:57:18,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:18,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214756004] [2022-03-15 15:57:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:18,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:18,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:18,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214756004] [2022-03-15 15:57:18,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214756004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:18,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708472579] [2022-03-15 15:57:18,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:18,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:18,856 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:18,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 15:57:18,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:18,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:19,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:19,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:19,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:19,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:57:19,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:57:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:19,606 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:19,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:19,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:19,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:19,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:19,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708472579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:19,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:19,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-15 15:57:19,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195244078] [2022-03-15 15:57:19,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:19,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:19,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:19,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:19,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:19,779 INFO L87 Difference]: Start difference. First operand 362 states and 1094 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:20,434 INFO L93 Difference]: Finished difference Result 692 states and 1988 transitions. [2022-03-15 15:57:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:57:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:20,435 INFO L225 Difference]: With dead ends: 692 [2022-03-15 15:57:20,436 INFO L226 Difference]: Without dead ends: 459 [2022-03-15 15:57:20,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:57:20,436 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 168 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:20,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 233 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 473 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-03-15 15:57:20,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-15 15:57:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 363. [2022-03-15 15:57:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.022099447513812) internal successors, (1094), 362 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1094 transitions. [2022-03-15 15:57:20,440 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1094 transitions. Word has length 22 [2022-03-15 15:57:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:20,440 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1094 transitions. [2022-03-15 15:57:20,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1094 transitions. [2022-03-15 15:57:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:20,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:20,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:20,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 15:57:20,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-15 15:57:20,642 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1508687481, now seen corresponding path program 59 times [2022-03-15 15:57:20,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:20,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128950913] [2022-03-15 15:57:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:57:20,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:20,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128950913] [2022-03-15 15:57:20,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128950913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:20,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755335720] [2022-03-15 15:57:20,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:20,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:20,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:20,737 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:20,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 15:57:20,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:20,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:20,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:21,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:21,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:21,304 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:21,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:21,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:21,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:57:21,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:21,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:57:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:21,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755335720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:21,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:21,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 15:57:21,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228940055] [2022-03-15 15:57:21,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:21,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:21,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:21,491 INFO L87 Difference]: Start difference. First operand 363 states and 1094 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:22,136 INFO L93 Difference]: Finished difference Result 787 states and 2270 transitions. [2022-03-15 15:57:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:22,138 INFO L225 Difference]: With dead ends: 787 [2022-03-15 15:57:22,138 INFO L226 Difference]: Without dead ends: 665 [2022-03-15 15:57:22,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:57:22,138 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 217 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:22,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 280 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-15 15:57:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 354. [2022-03-15 15:57:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.997167138810198) internal successors, (1058), 353 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2022-03-15 15:57:22,144 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 22 [2022-03-15 15:57:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:22,145 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2022-03-15 15:57:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2022-03-15 15:57:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:22,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:22,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:22,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 15:57:22,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:22,346 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash 246772879, now seen corresponding path program 60 times [2022-03-15 15:57:22,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:22,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810540248] [2022-03-15 15:57:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:22,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:22,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810540248] [2022-03-15 15:57:22,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810540248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:22,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518451794] [2022-03-15 15:57:22,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:22,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:22,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:22,549 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:22,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 15:57:22,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:22,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:22,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:22,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:22,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:23,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:23,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:57:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:23,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:57:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:23,385 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:23,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:23,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:23,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:23,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:23,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518451794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:23,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:23,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-15 15:57:23,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58859554] [2022-03-15 15:57:23,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:23,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:23,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:23,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:23,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:23,581 INFO L87 Difference]: Start difference. First operand 354 states and 1058 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:24,043 INFO L93 Difference]: Finished difference Result 710 states and 2011 transitions. [2022-03-15 15:57:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:57:24,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:24,044 INFO L225 Difference]: With dead ends: 710 [2022-03-15 15:57:24,044 INFO L226 Difference]: Without dead ends: 661 [2022-03-15 15:57:24,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:24,045 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 205 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:24,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 238 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 408 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-03-15 15:57:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-03-15 15:57:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 356. [2022-03-15 15:57:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.0028169014084507) internal successors, (1066), 355 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1066 transitions. [2022-03-15 15:57:24,050 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1066 transitions. Word has length 22 [2022-03-15 15:57:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:24,050 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1066 transitions. [2022-03-15 15:57:24,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1066 transitions. [2022-03-15 15:57:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:24,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:24,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:24,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:24,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:24,252 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash 589022373, now seen corresponding path program 61 times [2022-03-15 15:57:24,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:24,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569560123] [2022-03-15 15:57:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:24,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:24,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569560123] [2022-03-15 15:57:24,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569560123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:24,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990042990] [2022-03-15 15:57:24,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:24,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:24,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:24,336 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:24,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 15:57:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:24,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:24,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:24,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:57:24,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:57:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:24,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:57:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:24,972 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:24,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:25,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:25,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:25,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:25,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:25,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990042990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:25,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:25,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-15 15:57:25,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203618642] [2022-03-15 15:57:25,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:25,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:57:25,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:57:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:25,168 INFO L87 Difference]: Start difference. First operand 356 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:25,761 INFO L93 Difference]: Finished difference Result 592 states and 1705 transitions. [2022-03-15 15:57:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:57:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:25,763 INFO L225 Difference]: With dead ends: 592 [2022-03-15 15:57:25,763 INFO L226 Difference]: Without dead ends: 460 [2022-03-15 15:57:25,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:57:25,763 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:25,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 190 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 505 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-03-15 15:57:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-15 15:57:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 355. [2022-03-15 15:57:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0028248587570623) internal successors, (1063), 354 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1063 transitions. [2022-03-15 15:57:25,768 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1063 transitions. Word has length 22 [2022-03-15 15:57:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:25,768 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1063 transitions. [2022-03-15 15:57:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1063 transitions. [2022-03-15 15:57:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:25,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:25,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:25,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-15 15:57:25,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 15:57:25,970 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1722390457, now seen corresponding path program 62 times [2022-03-15 15:57:25,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:25,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084529997] [2022-03-15 15:57:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:26,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:26,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084529997] [2022-03-15 15:57:26,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084529997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:26,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364359266] [2022-03-15 15:57:26,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:26,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:26,143 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:26,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 15:57:26,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:26,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:26,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:26,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:26,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:26,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:57:26,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:57:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:26,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:26,923 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:26,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:27,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:27,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:27,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:27,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:27,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364359266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:27,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:27,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 15:57:27,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334067983] [2022-03-15 15:57:27,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:27,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:27,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:27,130 INFO L87 Difference]: Start difference. First operand 355 states and 1063 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:27,776 INFO L93 Difference]: Finished difference Result 762 states and 2163 transitions. [2022-03-15 15:57:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:57:27,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:27,777 INFO L225 Difference]: With dead ends: 762 [2022-03-15 15:57:27,778 INFO L226 Difference]: Without dead ends: 713 [2022-03-15 15:57:27,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:57:27,778 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:27,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 225 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 478 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-03-15 15:57:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-15 15:57:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 358. [2022-03-15 15:57:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0168067226890756) internal successors, (1077), 357 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1077 transitions. [2022-03-15 15:57:27,783 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1077 transitions. Word has length 22 [2022-03-15 15:57:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:27,783 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1077 transitions. [2022-03-15 15:57:27,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1077 transitions. [2022-03-15 15:57:27,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:27,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:27,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:27,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:27,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:27,984 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:27,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2064639951, now seen corresponding path program 63 times [2022-03-15 15:57:27,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:27,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584685399] [2022-03-15 15:57:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:27,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:28,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:28,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584685399] [2022-03-15 15:57:28,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584685399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:28,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514747907] [2022-03-15 15:57:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:28,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:28,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:28,137 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:28,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 15:57:28,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:57:28,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:28,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:28,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:28,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:28,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:57:28,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:57:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:28,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:28,770 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:28,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:28,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:28,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:28,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:28,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:28,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514747907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:28,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:28,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:57:28,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587280077] [2022-03-15 15:57:28,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:28,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:28,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:28,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:28,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:28,977 INFO L87 Difference]: Start difference. First operand 358 states and 1077 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:29,737 INFO L93 Difference]: Finished difference Result 738 states and 2083 transitions. [2022-03-15 15:57:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:57:29,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:29,738 INFO L225 Difference]: With dead ends: 738 [2022-03-15 15:57:29,738 INFO L226 Difference]: Without dead ends: 553 [2022-03-15 15:57:29,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:57:29,739 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:29,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 274 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 606 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-03-15 15:57:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-15 15:57:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 350. [2022-03-15 15:57:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.988538681948424) internal successors, (1043), 349 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1043 transitions. [2022-03-15 15:57:29,743 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1043 transitions. Word has length 22 [2022-03-15 15:57:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:29,743 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1043 transitions. [2022-03-15 15:57:29,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1043 transitions. [2022-03-15 15:57:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:29,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:29,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:29,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:29,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:29,946 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:29,946 INFO L85 PathProgramCache]: Analyzing trace with hash 661612367, now seen corresponding path program 64 times [2022-03-15 15:57:29,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:29,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042293089] [2022-03-15 15:57:29,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:29,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:30,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042293089] [2022-03-15 15:57:30,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042293089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:30,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74771252] [2022-03-15 15:57:30,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:30,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:30,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:30,062 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:30,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 15:57:30,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:30,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:30,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:30,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:30,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:57:30,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:30,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:30,733 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:30,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:30,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:30,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:30,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:30,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74771252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:30,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:30,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-15 15:57:30,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107218271] [2022-03-15 15:57:30,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:30,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:30,985 INFO L87 Difference]: Start difference. First operand 350 states and 1043 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:31,334 INFO L93 Difference]: Finished difference Result 481 states and 1428 transitions. [2022-03-15 15:57:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:31,335 INFO L225 Difference]: With dead ends: 481 [2022-03-15 15:57:31,335 INFO L226 Difference]: Without dead ends: 472 [2022-03-15 15:57:31,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:31,336 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:31,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 135 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 330 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-03-15 15:57:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-15 15:57:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2022-03-15 15:57:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9827586206896552) internal successors, (1038), 348 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1038 transitions. [2022-03-15 15:57:31,340 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1038 transitions. Word has length 22 [2022-03-15 15:57:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:31,340 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1038 transitions. [2022-03-15 15:57:31,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1038 transitions. [2022-03-15 15:57:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:31,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:31,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:31,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 15:57:31,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 15:57:31,541 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1028330537, now seen corresponding path program 65 times [2022-03-15 15:57:31,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:31,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173724891] [2022-03-15 15:57:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:31,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:31,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173724891] [2022-03-15 15:57:31,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173724891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:31,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800454293] [2022-03-15 15:57:31,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:31,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:31,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:31,752 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:31,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 15:57:31,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:31,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:31,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:31,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:31,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:32,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:32,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:32,291 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:32,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:32,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:32,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:57:32,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:32,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-03-15 15:57:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:32,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800454293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:32,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:32,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-15 15:57:32,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643357637] [2022-03-15 15:57:32,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:32,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:32,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:32,507 INFO L87 Difference]: Start difference. First operand 349 states and 1038 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:33,366 INFO L93 Difference]: Finished difference Result 663 states and 1878 transitions. [2022-03-15 15:57:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:33,367 INFO L225 Difference]: With dead ends: 663 [2022-03-15 15:57:33,367 INFO L226 Difference]: Without dead ends: 657 [2022-03-15 15:57:33,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:57:33,368 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:33,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 234 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-15 15:57:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 341. [2022-03-15 15:57:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.961764705882353) internal successors, (1007), 340 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1007 transitions. [2022-03-15 15:57:33,373 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1007 transitions. Word has length 22 [2022-03-15 15:57:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:33,373 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1007 transitions. [2022-03-15 15:57:33,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1007 transitions. [2022-03-15 15:57:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:33,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:33,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:33,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 15:57:33,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:33,576 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1467496933, now seen corresponding path program 66 times [2022-03-15 15:57:33,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:33,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364060189] [2022-03-15 15:57:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:33,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:33,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364060189] [2022-03-15 15:57:33,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364060189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:33,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337847510] [2022-03-15 15:57:33,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:33,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:33,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:33,779 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:33,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 15:57:33,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:34,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:34,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:34,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:34,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-15 15:57:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:34,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:34,637 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:34,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:34,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:34,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:34,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:34,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:34,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337847510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:34,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:34,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 15:57:34,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29258153] [2022-03-15 15:57:34,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:34,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:34,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:34,836 INFO L87 Difference]: Start difference. First operand 341 states and 1007 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:35,248 INFO L93 Difference]: Finished difference Result 587 states and 1657 transitions. [2022-03-15 15:57:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:57:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:35,249 INFO L225 Difference]: With dead ends: 587 [2022-03-15 15:57:35,249 INFO L226 Difference]: Without dead ends: 529 [2022-03-15 15:57:35,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:35,249 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:35,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 212 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 322 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-03-15 15:57:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-15 15:57:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 393. [2022-03-15 15:57:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.9770408163265305) internal successors, (1167), 392 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1167 transitions. [2022-03-15 15:57:35,255 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1167 transitions. Word has length 22 [2022-03-15 15:57:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:35,255 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1167 transitions. [2022-03-15 15:57:35,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1167 transitions. [2022-03-15 15:57:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:35,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:35,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:35,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 15:57:35,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:35,456 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1748935899, now seen corresponding path program 67 times [2022-03-15 15:57:35,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:35,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683056857] [2022-03-15 15:57:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:35,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:35,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:35,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683056857] [2022-03-15 15:57:35,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683056857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:35,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182208085] [2022-03-15 15:57:35,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:35,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:35,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:35,635 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:35,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 15:57:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:35,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:35,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:36,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:36,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-15 15:57:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:36,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:36,332 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:36,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:36,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:36,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:36,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:36,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:36,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182208085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:36,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:36,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 15:57:36,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692659730] [2022-03-15 15:57:36,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:36,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:36,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:36,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:36,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:36,532 INFO L87 Difference]: Start difference. First operand 393 states and 1167 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:36,999 INFO L93 Difference]: Finished difference Result 647 states and 1846 transitions. [2022-03-15 15:57:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:57:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:37,001 INFO L225 Difference]: With dead ends: 647 [2022-03-15 15:57:37,001 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 15:57:37,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:57:37,001 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:37,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 211 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-03-15 15:57:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 15:57:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 420. [2022-03-15 15:57:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.990453460620525) internal successors, (1253), 419 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1253 transitions. [2022-03-15 15:57:37,007 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1253 transitions. Word has length 22 [2022-03-15 15:57:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:37,007 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1253 transitions. [2022-03-15 15:57:37,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1253 transitions. [2022-03-15 15:57:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:37,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:37,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:37,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:37,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-15 15:57:37,210 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1395243365, now seen corresponding path program 68 times [2022-03-15 15:57:37,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:37,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882571185] [2022-03-15 15:57:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:37,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:37,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:37,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882571185] [2022-03-15 15:57:37,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882571185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:37,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835140015] [2022-03-15 15:57:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:37,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:37,418 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 15:57:37,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:37,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:37,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:37,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:37,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:38,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:38,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-15 15:57:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:38,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:38,163 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:38,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:38,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:38,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:38,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:38,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:38,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835140015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:38,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:38,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 15:57:38,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426286942] [2022-03-15 15:57:38,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:38,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:38,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:38,400 INFO L87 Difference]: Start difference. First operand 420 states and 1253 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:38,709 INFO L93 Difference]: Finished difference Result 580 states and 1686 transitions. [2022-03-15 15:57:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:38,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:38,711 INFO L225 Difference]: With dead ends: 580 [2022-03-15 15:57:38,711 INFO L226 Difference]: Without dead ends: 442 [2022-03-15 15:57:38,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:38,711 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:38,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 182 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 403 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-03-15 15:57:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-15 15:57:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 380. [2022-03-15 15:57:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9577836411609497) internal successors, (1121), 379 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1121 transitions. [2022-03-15 15:57:38,715 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1121 transitions. Word has length 22 [2022-03-15 15:57:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:38,715 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1121 transitions. [2022-03-15 15:57:38,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1121 transitions. [2022-03-15 15:57:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:38,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:38,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:38,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 15:57:38,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:38,917 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1556958159, now seen corresponding path program 69 times [2022-03-15 15:57:38,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:38,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224167135] [2022-03-15 15:57:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:39,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:39,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224167135] [2022-03-15 15:57:39,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224167135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:39,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401376021] [2022-03-15 15:57:39,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:39,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:39,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:39,126 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:39,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 15:57:39,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:57:39,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:39,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:39,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:39,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:57:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:40,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:57:40,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:40,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:57:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:40,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:40,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:40,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:40,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:40,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:57:40,566 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:40,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:40,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401376021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:40,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:40,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 15:57:40,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141245945] [2022-03-15 15:57:40,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:40,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:40,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:40,586 INFO L87 Difference]: Start difference. First operand 380 states and 1121 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:40,804 INFO L93 Difference]: Finished difference Result 520 states and 1555 transitions. [2022-03-15 15:57:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:57:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:40,805 INFO L225 Difference]: With dead ends: 520 [2022-03-15 15:57:40,805 INFO L226 Difference]: Without dead ends: 520 [2022-03-15 15:57:40,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:57:40,806 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:40,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 155 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 290 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-03-15 15:57:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-15 15:57:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 392. [2022-03-15 15:57:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.9846547314578005) internal successors, (1167), 391 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1167 transitions. [2022-03-15 15:57:40,811 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1167 transitions. Word has length 22 [2022-03-15 15:57:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:40,811 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1167 transitions. [2022-03-15 15:57:40,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1167 transitions. [2022-03-15 15:57:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:40,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:40,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:40,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:41,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:41,012 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1243406173, now seen corresponding path program 70 times [2022-03-15 15:57:41,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:41,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367867758] [2022-03-15 15:57:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:41,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:41,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367867758] [2022-03-15 15:57:41,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367867758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:41,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291028223] [2022-03-15 15:57:41,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:41,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:41,098 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:41,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 15:57:41,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:41,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:41,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:57:41,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:41,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:41,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:41,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:41,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:41,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:41,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:57:41,928 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:41,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:41,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291028223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:41,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:41,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-03-15 15:57:41,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651285153] [2022-03-15 15:57:41,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:41,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:41,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:41,950 INFO L87 Difference]: Start difference. First operand 392 states and 1167 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:42,206 INFO L93 Difference]: Finished difference Result 661 states and 2002 transitions. [2022-03-15 15:57:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:42,207 INFO L225 Difference]: With dead ends: 661 [2022-03-15 15:57:42,207 INFO L226 Difference]: Without dead ends: 584 [2022-03-15 15:57:42,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:57:42,207 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:42,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 218 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 382 Invalid, 0 Unknown, 252 Unchecked, 0.1s Time] [2022-03-15 15:57:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-15 15:57:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 437. [2022-03-15 15:57:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.0779816513761467) internal successors, (1342), 436 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1342 transitions. [2022-03-15 15:57:42,213 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1342 transitions. Word has length 22 [2022-03-15 15:57:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:42,213 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1342 transitions. [2022-03-15 15:57:42,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1342 transitions. [2022-03-15 15:57:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:42,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:42,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:42,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 15:57:42,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:42,414 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:42,415 INFO L85 PathProgramCache]: Analyzing trace with hash -769451599, now seen corresponding path program 71 times [2022-03-15 15:57:42,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:42,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519530747] [2022-03-15 15:57:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:42,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:42,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:42,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519530747] [2022-03-15 15:57:42,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519530747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:42,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693861238] [2022-03-15 15:57:42,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:42,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:42,558 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:42,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 15:57:42,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:42,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:57:42,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:42,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:43,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:43,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:57:43,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:43,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 15:57:43,213 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:43,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:43,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693861238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:43,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:43,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:57:43,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506627880] [2022-03-15 15:57:43,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:43,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:43,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:43,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:43,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:43,226 INFO L87 Difference]: Start difference. First operand 437 states and 1342 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:43,872 INFO L93 Difference]: Finished difference Result 876 states and 2518 transitions. [2022-03-15 15:57:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:57:43,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:43,873 INFO L225 Difference]: With dead ends: 876 [2022-03-15 15:57:43,873 INFO L226 Difference]: Without dead ends: 794 [2022-03-15 15:57:43,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:57:43,873 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:43,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 270 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-15 15:57:43,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 414. [2022-03-15 15:57:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.053268765133172) internal successors, (1261), 413 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1261 transitions. [2022-03-15 15:57:43,880 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1261 transitions. Word has length 22 [2022-03-15 15:57:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:43,880 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1261 transitions. [2022-03-15 15:57:43,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1261 transitions. [2022-03-15 15:57:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:43,881 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:43,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:43,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 15:57:44,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 15:57:44,082 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash 717262333, now seen corresponding path program 72 times [2022-03-15 15:57:44,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:44,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190977965] [2022-03-15 15:57:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:44,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:44,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190977965] [2022-03-15 15:57:44,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190977965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:44,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592142004] [2022-03-15 15:57:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:44,217 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:44,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 15:57:44,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:44,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:44,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:44,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:44,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:57:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:44,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:57:44,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:57:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:44,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:44,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:45,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:45,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:57:45,015 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:45,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:45,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592142004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:45,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:45,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 15:57:45,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899155589] [2022-03-15 15:57:45,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:45,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:45,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:45,038 INFO L87 Difference]: Start difference. First operand 414 states and 1261 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:45,473 INFO L93 Difference]: Finished difference Result 953 states and 2735 transitions. [2022-03-15 15:57:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:57:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:45,474 INFO L225 Difference]: With dead ends: 953 [2022-03-15 15:57:45,474 INFO L226 Difference]: Without dead ends: 751 [2022-03-15 15:57:45,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:57:45,475 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:45,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 258 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 629 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-03-15 15:57:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-15 15:57:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 433. [2022-03-15 15:57:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.064814814814815) internal successors, (1324), 432 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1324 transitions. [2022-03-15 15:57:45,481 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1324 transitions. Word has length 22 [2022-03-15 15:57:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:45,481 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1324 transitions. [2022-03-15 15:57:45,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1324 transitions. [2022-03-15 15:57:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:45,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:45,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:45,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 15:57:45,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:45,682 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 56462821, now seen corresponding path program 73 times [2022-03-15 15:57:45,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:45,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978409071] [2022-03-15 15:57:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:45,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:57:45,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:45,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978409071] [2022-03-15 15:57:45,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978409071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:45,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135366861] [2022-03-15 15:57:45,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:45,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:45,776 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:45,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 15:57:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:45,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:45,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:46,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:46,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:57:46,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:46,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:46,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:46,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:46,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:46,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:46,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:57:46,566 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:46,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:46,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135366861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:46,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:46,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-03-15 15:57:46,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459872173] [2022-03-15 15:57:46,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:46,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:46,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:46,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:46,589 INFO L87 Difference]: Start difference. First operand 433 states and 1324 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:46,871 INFO L93 Difference]: Finished difference Result 698 states and 2022 transitions. [2022-03-15 15:57:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:46,873 INFO L225 Difference]: With dead ends: 698 [2022-03-15 15:57:46,873 INFO L226 Difference]: Without dead ends: 549 [2022-03-15 15:57:46,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:46,873 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:46,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 206 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 471 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-15 15:57:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-15 15:57:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 424. [2022-03-15 15:57:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.0189125295508275) internal successors, (1277), 423 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1277 transitions. [2022-03-15 15:57:46,878 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1277 transitions. Word has length 22 [2022-03-15 15:57:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:46,878 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1277 transitions. [2022-03-15 15:57:46,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1277 transitions. [2022-03-15 15:57:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:46,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:46,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:46,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 15:57:47,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:47,079 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1579371001, now seen corresponding path program 74 times [2022-03-15 15:57:47,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:47,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742862830] [2022-03-15 15:57:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:47,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:47,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742862830] [2022-03-15 15:57:47,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742862830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:47,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733213357] [2022-03-15 15:57:47,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:47,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:47,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:47,251 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:47,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 15:57:47,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:47,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:47,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:47,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:47,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:47,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-15 15:57:47,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:47,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-15 15:57:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:47,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:47,960 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:47,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:48,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:48,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:48,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:48,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 15:57:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:48,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733213357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:48,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:48,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 15:57:48,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621148770] [2022-03-15 15:57:48,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:48,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:57:48,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:57:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:48,160 INFO L87 Difference]: Start difference. First operand 424 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:48,479 INFO L93 Difference]: Finished difference Result 560 states and 1618 transitions. [2022-03-15 15:57:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:57:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:48,480 INFO L225 Difference]: With dead ends: 560 [2022-03-15 15:57:48,480 INFO L226 Difference]: Without dead ends: 439 [2022-03-15 15:57:48,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:57:48,480 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:48,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 240 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 329 Unchecked, 0.2s Time] [2022-03-15 15:57:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-03-15 15:57:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 377. [2022-03-15 15:57:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.00531914893617) internal successors, (1130), 376 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1130 transitions. [2022-03-15 15:57:48,485 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1130 transitions. Word has length 22 [2022-03-15 15:57:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:48,485 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1130 transitions. [2022-03-15 15:57:48,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1130 transitions. [2022-03-15 15:57:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:48,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:48,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:48,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:48,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-03-15 15:57:48,709 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1091476553, now seen corresponding path program 75 times [2022-03-15 15:57:48,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:48,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78855896] [2022-03-15 15:57:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:48,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:48,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78855896] [2022-03-15 15:57:48,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78855896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:48,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822210456] [2022-03-15 15:57:48,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:48,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:48,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:48,888 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:48,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 15:57:48,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:57:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:49,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:57:49,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-03-15 15:57:49,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:49,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-15 15:57:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:57:49,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:49,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-03-15 15:57:50,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:50,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-15 15:57:50,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:57:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:57:50,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822210456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:50,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:50,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-15 15:57:50,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081730699] [2022-03-15 15:57:50,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:50,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:57:50,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:57:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:50,061 INFO L87 Difference]: Start difference. First operand 377 states and 1130 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:50,317 INFO L93 Difference]: Finished difference Result 564 states and 1652 transitions. [2022-03-15 15:57:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:57:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:50,318 INFO L225 Difference]: With dead ends: 564 [2022-03-15 15:57:50,318 INFO L226 Difference]: Without dead ends: 485 [2022-03-15 15:57:50,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:57:50,318 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:50,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 114 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 362 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 15:57:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-15 15:57:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 370. [2022-03-15 15:57:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.989159891598916) internal successors, (1103), 369 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1103 transitions. [2022-03-15 15:57:50,323 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1103 transitions. Word has length 22 [2022-03-15 15:57:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:50,323 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1103 transitions. [2022-03-15 15:57:50,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1103 transitions. [2022-03-15 15:57:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:50,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:50,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:50,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:50,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:50,524 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1201613417, now seen corresponding path program 76 times [2022-03-15 15:57:50,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:50,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007207643] [2022-03-15 15:57:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:50,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:50,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007207643] [2022-03-15 15:57:50,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007207643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:50,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616956115] [2022-03-15 15:57:50,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:50,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:50,755 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:50,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 15:57:50,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:50,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:50,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 15:57:51,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:51,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:51,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:51,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:51,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:57:51,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:51,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-15 15:57:51,501 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:51,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:51,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616956115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:51,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:51,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-15 15:57:51,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644015174] [2022-03-15 15:57:51,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:51,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:51,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:51,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:51,518 INFO L87 Difference]: Start difference. First operand 370 states and 1103 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:52,711 INFO L93 Difference]: Finished difference Result 801 states and 2266 transitions. [2022-03-15 15:57:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:57:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:52,712 INFO L225 Difference]: With dead ends: 801 [2022-03-15 15:57:52,712 INFO L226 Difference]: Without dead ends: 722 [2022-03-15 15:57:52,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=505, Invalid=1945, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:57:52,713 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:52,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 392 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 758 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-03-15 15:57:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-15 15:57:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 380. [2022-03-15 15:57:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0) internal successors, (1137), 379 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1137 transitions. [2022-03-15 15:57:52,718 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1137 transitions. Word has length 22 [2022-03-15 15:57:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:52,718 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1137 transitions. [2022-03-15 15:57:52,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1137 transitions. [2022-03-15 15:57:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:52,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:52,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:52,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:52,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:52,920 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1124796341, now seen corresponding path program 77 times [2022-03-15 15:57:52,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:52,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874964981] [2022-03-15 15:57:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:53,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:53,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874964981] [2022-03-15 15:57:53,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874964981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:53,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180546119] [2022-03-15 15:57:53,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:53,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:53,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:53,048 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:53,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 15:57:53,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:53,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:53,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:57:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:53,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:53,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:53,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:57:53,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:53,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 15:57:53,655 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 15:57:53,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:53,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180546119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:53,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:53,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:57:53,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891381052] [2022-03-15 15:57:53,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:53,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:53,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:53,667 INFO L87 Difference]: Start difference. First operand 380 states and 1137 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:54,289 INFO L93 Difference]: Finished difference Result 555 states and 1625 transitions. [2022-03-15 15:57:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:54,290 INFO L225 Difference]: With dead ends: 555 [2022-03-15 15:57:54,290 INFO L226 Difference]: Without dead ends: 494 [2022-03-15 15:57:54,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:57:54,290 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 196 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:54,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 231 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-03-15 15:57:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 361. [2022-03-15 15:57:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9555555555555557) internal successors, (1064), 360 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1064 transitions. [2022-03-15 15:57:54,295 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1064 transitions. Word has length 22 [2022-03-15 15:57:54,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:54,295 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1064 transitions. [2022-03-15 15:57:54,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1064 transitions. [2022-03-15 15:57:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:54,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:54,295 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:54,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 15:57:54,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:54,496 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:54,496 INFO L85 PathProgramCache]: Analyzing trace with hash -455195744, now seen corresponding path program 78 times [2022-03-15 15:57:54,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:54,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892067716] [2022-03-15 15:57:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:54,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:57:54,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:54,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892067716] [2022-03-15 15:57:54,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892067716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:54,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601696701] [2022-03-15 15:57:54,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:54,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:54,564 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:54,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 15:57:54,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:57:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:57:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:54,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-03-15 15:57:54,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:57:54,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:57:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:57:55,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:55,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:57:55,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-03-15 15:57:55,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:55,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 141 [2022-03-15 15:57:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 15:57:55,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601696701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:55,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:55,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:57:55,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391398038] [2022-03-15 15:57:55,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:55,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:57:55,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:57:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:57:55,502 INFO L87 Difference]: Start difference. First operand 361 states and 1064 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:55,657 INFO L93 Difference]: Finished difference Result 453 states and 1304 transitions. [2022-03-15 15:57:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:57:55,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:55,658 INFO L225 Difference]: With dead ends: 453 [2022-03-15 15:57:55,658 INFO L226 Difference]: Without dead ends: 378 [2022-03-15 15:57:55,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:57:55,659 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:55,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 62 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-15 15:57:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 304. [2022-03-15 15:57:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-15 15:57:55,662 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-15 15:57:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:55,662 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-15 15:57:55,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-15 15:57:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:55,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:55,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:55,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 15:57:55,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 15:57:55,863 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222629, now seen corresponding path program 79 times [2022-03-15 15:57:55,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:55,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230692665] [2022-03-15 15:57:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:55,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:55,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230692665] [2022-03-15 15:57:55,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230692665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:55,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338906624] [2022-03-15 15:57:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:55,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:55,947 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:55,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 15:57:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:56,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:56,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:56,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:56,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:57:56,384 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:56,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:56,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:56,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338906624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:56,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:56,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:57:56,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010969196] [2022-03-15 15:57:56,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:56,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:57:56,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:57:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:57:56,393 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:56,818 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2022-03-15 15:57:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:56,819 INFO L225 Difference]: With dead ends: 485 [2022-03-15 15:57:56,819 INFO L226 Difference]: Without dead ends: 485 [2022-03-15 15:57:56,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:56,820 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:56,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 248 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-15 15:57:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2022-03-15 15:57:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-03-15 15:57:56,825 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-03-15 15:57:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:56,825 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-03-15 15:57:56,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-03-15 15:57:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:56,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:56,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:56,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 15:57:57,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-15 15:57:57,026 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash -260222965, now seen corresponding path program 80 times [2022-03-15 15:57:57,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:57,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406701038] [2022-03-15 15:57:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:57,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:57,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:57,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406701038] [2022-03-15 15:57:57,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406701038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:57,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162618973] [2022-03-15 15:57:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:57,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:57,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:57,101 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:57,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 15:57:57,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:57,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:57:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:57,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:57,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:57,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:57:57,606 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:57,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:57,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:57,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162618973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:57,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:57,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:57:57,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319089732] [2022-03-15 15:57:57,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:57,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:57,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:57,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:57,614 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:58,058 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2022-03-15 15:57:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:57:58,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:58,059 INFO L225 Difference]: With dead ends: 594 [2022-03-15 15:57:58,059 INFO L226 Difference]: Without dead ends: 594 [2022-03-15 15:57:58,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:58,059 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:58,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 233 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-15 15:57:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2022-03-15 15:57:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2022-03-15 15:57:58,064 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2022-03-15 15:57:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:58,064 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2022-03-15 15:57:58,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2022-03-15 15:57:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:58,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:58,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:58,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:58,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-15 15:57:58,266 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1234379999, now seen corresponding path program 81 times [2022-03-15 15:57:58,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:58,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7663016] [2022-03-15 15:57:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:58,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:58,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:58,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7663016] [2022-03-15 15:57:58,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7663016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:58,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158566298] [2022-03-15 15:57:58,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:58,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:58,338 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:58,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 15:57:58,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:58,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:58,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:58,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:58,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:57:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:58,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:58,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:58,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:57:58,811 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:58,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:58,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:58,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158566298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:58,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:58,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:57:58,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938182389] [2022-03-15 15:57:58,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:58,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:57:58,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:58,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:57:58,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:57:58,819 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:59,165 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2022-03-15 15:57:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:57:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:59,166 INFO L225 Difference]: With dead ends: 573 [2022-03-15 15:57:59,166 INFO L226 Difference]: Without dead ends: 563 [2022-03-15 15:57:59,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:59,167 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 226 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:59,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 193 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:57:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-15 15:57:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2022-03-15 15:57:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2022-03-15 15:57:59,171 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2022-03-15 15:57:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:59,171 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2022-03-15 15:57:59,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2022-03-15 15:57:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:57:59,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:59,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:59,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 15:57:59,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 15:57:59,373 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:57:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash 915267679, now seen corresponding path program 82 times [2022-03-15 15:57:59,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:59,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467956666] [2022-03-15 15:57:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:59,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:59,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:59,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467956666] [2022-03-15 15:57:59,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467956666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:59,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359331306] [2022-03-15 15:57:59,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:59,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:59,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:59,456 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:59,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 15:57:59,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:59,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:57:59,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:59,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:59,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:59,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:57:59,931 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:57:59,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:57:59,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:57:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:59,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359331306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:59,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:59,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:57:59,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957414698] [2022-03-15 15:57:59,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:59,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:57:59,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:57:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:57:59,938 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:00,336 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2022-03-15 15:58:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:00,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:00,337 INFO L225 Difference]: With dead ends: 506 [2022-03-15 15:58:00,337 INFO L226 Difference]: Without dead ends: 506 [2022-03-15 15:58:00,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:00,337 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:00,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 252 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-15 15:58:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2022-03-15 15:58:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-03-15 15:58:00,341 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-03-15 15:58:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:00,341 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-03-15 15:58:00,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-03-15 15:58:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:00,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:00,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:00,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:00,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:00,544 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1143347419, now seen corresponding path program 83 times [2022-03-15 15:58:00,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:00,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849034138] [2022-03-15 15:58:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:00,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:00,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849034138] [2022-03-15 15:58:00,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849034138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:00,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634689055] [2022-03-15 15:58:00,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:00,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:00,622 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:00,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 15:58:00,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:00,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:00,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:00,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:58:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:00,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:01,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:01,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:01,139 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:01,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:01,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:01,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634689055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:01,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:01,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:01,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878318915] [2022-03-15 15:58:01,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:01,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:01,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:01,147 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:01,541 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2022-03-15 15:58:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:01,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:01,542 INFO L225 Difference]: With dead ends: 458 [2022-03-15 15:58:01,542 INFO L226 Difference]: Without dead ends: 458 [2022-03-15 15:58:01,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=848, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:58:01,543 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 210 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:01,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 151 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-15 15:58:01,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2022-03-15 15:58:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2022-03-15 15:58:01,547 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2022-03-15 15:58:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:01,548 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2022-03-15 15:58:01,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2022-03-15 15:58:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:01,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:01,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:01,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 15:58:01,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 15:58:01,763 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash 351255545, now seen corresponding path program 84 times [2022-03-15 15:58:01,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:01,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483424452] [2022-03-15 15:58:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:01,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:01,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:01,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483424452] [2022-03-15 15:58:01,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483424452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:01,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689124718] [2022-03-15 15:58:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:01,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:01,843 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:01,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 15:58:02,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:58:02,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:02,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:58:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:02,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:02,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:02,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:02,472 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:02,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:02,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:02,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689124718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:02,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:02,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:02,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357897810] [2022-03-15 15:58:02,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:02,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:02,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:02,481 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:02,891 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2022-03-15 15:58:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:02,892 INFO L225 Difference]: With dead ends: 475 [2022-03-15 15:58:02,892 INFO L226 Difference]: Without dead ends: 465 [2022-03-15 15:58:02,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:02,893 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 176 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:02,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 174 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-15 15:58:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2022-03-15 15:58:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2022-03-15 15:58:02,897 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2022-03-15 15:58:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:02,897 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2022-03-15 15:58:02,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2022-03-15 15:58:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:02,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:02,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:02,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 15:58:03,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 15:58:03,098 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash 776202755, now seen corresponding path program 85 times [2022-03-15 15:58:03,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:03,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652022140] [2022-03-15 15:58:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:03,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:03,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:03,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652022140] [2022-03-15 15:58:03,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652022140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:03,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522450381] [2022-03-15 15:58:03,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:03,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:03,173 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:03,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 15:58:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:03,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:03,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:03,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:03,654 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:03,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:03,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:03,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522450381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:03,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:03,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:03,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658271115] [2022-03-15 15:58:03,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:03,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:03,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:03,662 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:04,046 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-03-15 15:58:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:04,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:04,047 INFO L225 Difference]: With dead ends: 429 [2022-03-15 15:58:04,047 INFO L226 Difference]: Without dead ends: 409 [2022-03-15 15:58:04,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:04,047 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:04,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 232 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-03-15 15:58:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 322. [2022-03-15 15:58:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2022-03-15 15:58:04,051 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2022-03-15 15:58:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:04,051 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2022-03-15 15:58:04,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2022-03-15 15:58:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:04,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:04,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:04,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:04,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 15:58:04,252 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash 937124177, now seen corresponding path program 86 times [2022-03-15 15:58:04,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:04,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007497742] [2022-03-15 15:58:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:04,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:04,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007497742] [2022-03-15 15:58:04,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007497742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:04,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117988342] [2022-03-15 15:58:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:04,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:04,357 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:04,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 15:58:04,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:04,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:04,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:04,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:04,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:58:04,874 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:04,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:04,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:04,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117988342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:04,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:04,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:04,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458634573] [2022-03-15 15:58:04,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:04,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:04,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:04,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:04,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:04,882 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:05,279 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2022-03-15 15:58:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:05,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:05,280 INFO L225 Difference]: With dead ends: 488 [2022-03-15 15:58:05,280 INFO L226 Difference]: Without dead ends: 488 [2022-03-15 15:58:05,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:05,280 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 207 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:05,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 218 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-15 15:58:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2022-03-15 15:58:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2022-03-15 15:58:05,285 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2022-03-15 15:58:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:05,285 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2022-03-15 15:58:05,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2022-03-15 15:58:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:05,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:05,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:05,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 15:58:05,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:05,486 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1863240155, now seen corresponding path program 87 times [2022-03-15 15:58:05,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:05,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101179402] [2022-03-15 15:58:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:05,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:05,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101179402] [2022-03-15 15:58:05,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101179402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:05,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59670242] [2022-03-15 15:58:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:05,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:05,572 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:05,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 15:58:05,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:05,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:05,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:05,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:05,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:58:06,061 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:06,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:06,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59670242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:06,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:06,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:06,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366730727] [2022-03-15 15:58:06,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:06,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:06,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:06,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:06,068 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:06,407 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2022-03-15 15:58:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:06,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:06,408 INFO L225 Difference]: With dead ends: 473 [2022-03-15 15:58:06,408 INFO L226 Difference]: Without dead ends: 463 [2022-03-15 15:58:06,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:58:06,408 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:06,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 227 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-15 15:58:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2022-03-15 15:58:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2022-03-15 15:58:06,412 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2022-03-15 15:58:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:06,412 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2022-03-15 15:58:06,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2022-03-15 15:58:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:06,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:06,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:06,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 15:58:06,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-15 15:58:06,614 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:06,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2112614821, now seen corresponding path program 88 times [2022-03-15 15:58:06,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:06,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468197959] [2022-03-15 15:58:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:06,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:06,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468197959] [2022-03-15 15:58:06,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468197959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:06,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784894669] [2022-03-15 15:58:06,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:06,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:06,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:06,695 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:06,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 15:58:06,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:06,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:06,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:07,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:07,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:58:07,214 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:07,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:07,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:07,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784894669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:07,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:07,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:07,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610633002] [2022-03-15 15:58:07,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:07,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:07,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:07,221 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:07,543 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2022-03-15 15:58:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:07,544 INFO L225 Difference]: With dead ends: 400 [2022-03-15 15:58:07,544 INFO L226 Difference]: Without dead ends: 400 [2022-03-15 15:58:07,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:07,545 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:07,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 195 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-15 15:58:07,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2022-03-15 15:58:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-03-15 15:58:07,548 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-03-15 15:58:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:07,548 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-03-15 15:58:07,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-03-15 15:58:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:07,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:07,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:07,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 15:58:07,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-15 15:58:07,751 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash -359358453, now seen corresponding path program 89 times [2022-03-15 15:58:07,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:07,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225475219] [2022-03-15 15:58:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:07,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:07,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:07,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225475219] [2022-03-15 15:58:07,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225475219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:07,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538864939] [2022-03-15 15:58:07,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:07,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:07,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:07,826 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:07,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 15:58:07,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:07,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:07,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:08,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:58:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:08,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:08,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:08,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:08,355 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:08,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:08,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:08,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538864939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:08,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:08,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:08,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556700675] [2022-03-15 15:58:08,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:08,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:08,363 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:08,763 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2022-03-15 15:58:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:08,764 INFO L225 Difference]: With dead ends: 563 [2022-03-15 15:58:08,764 INFO L226 Difference]: Without dead ends: 563 [2022-03-15 15:58:08,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:08,764 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:08,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 225 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-15 15:58:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2022-03-15 15:58:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2022-03-15 15:58:08,769 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2022-03-15 15:58:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:08,769 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2022-03-15 15:58:08,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2022-03-15 15:58:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:08,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:08,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:08,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 15:58:08,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 15:58:08,970 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1135244511, now seen corresponding path program 90 times [2022-03-15 15:58:08,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:08,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886911361] [2022-03-15 15:58:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:08,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:09,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:09,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886911361] [2022-03-15 15:58:09,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886911361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:09,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307506244] [2022-03-15 15:58:09,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:09,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:09,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:09,048 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:09,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 15:58:09,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:58:09,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:09,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:09,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:58:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:09,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:09,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:09,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:09,621 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:09,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:09,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:09,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307506244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:09,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:09,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:09,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048563429] [2022-03-15 15:58:09,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:09,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:09,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:09,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:09,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:09,628 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:10,229 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2022-03-15 15:58:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:58:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:10,230 INFO L225 Difference]: With dead ends: 595 [2022-03-15 15:58:10,230 INFO L226 Difference]: Without dead ends: 585 [2022-03-15 15:58:10,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:58:10,231 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:10,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 225 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-15 15:58:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2022-03-15 15:58:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2022-03-15 15:58:10,236 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2022-03-15 15:58:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:10,236 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2022-03-15 15:58:10,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2022-03-15 15:58:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:10,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:10,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:10,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 15:58:10,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:10,437 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1560191721, now seen corresponding path program 91 times [2022-03-15 15:58:10,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:10,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630053812] [2022-03-15 15:58:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:10,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:10,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:10,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630053812] [2022-03-15 15:58:10,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630053812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:10,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851681646] [2022-03-15 15:58:10,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:10,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:10,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:10,501 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:10,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 15:58:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:10,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:10,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:10,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:10,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:11,005 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:11,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:11,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:11,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851681646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:11,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:11,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:11,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555597917] [2022-03-15 15:58:11,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:11,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:11,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:11,012 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:11,457 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2022-03-15 15:58:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:11,458 INFO L225 Difference]: With dead ends: 572 [2022-03-15 15:58:11,458 INFO L226 Difference]: Without dead ends: 552 [2022-03-15 15:58:11,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:58:11,458 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 146 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:11,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 245 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-03-15 15:58:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2022-03-15 15:58:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2022-03-15 15:58:11,462 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2022-03-15 15:58:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:11,462 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2022-03-15 15:58:11,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2022-03-15 15:58:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:11,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:11,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:11,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 15:58:11,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:11,663 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash -963179015, now seen corresponding path program 92 times [2022-03-15 15:58:11,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:11,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333342859] [2022-03-15 15:58:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:11,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:11,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:11,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333342859] [2022-03-15 15:58:11,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333342859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:11,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141214201] [2022-03-15 15:58:11,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:11,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:11,721 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:11,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 15:58:11,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:11,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:11,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:11,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:11,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:12,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:12,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:12,192 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:12,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:12,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141214201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:12,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:12,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:12,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79089055] [2022-03-15 15:58:12,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:12,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:12,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:12,199 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:12,633 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2022-03-15 15:58:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:12,634 INFO L225 Difference]: With dead ends: 515 [2022-03-15 15:58:12,635 INFO L226 Difference]: Without dead ends: 479 [2022-03-15 15:58:12,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:12,635 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 151 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:12,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 278 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-15 15:58:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2022-03-15 15:58:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2022-03-15 15:58:12,639 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2022-03-15 15:58:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:12,639 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2022-03-15 15:58:12,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2022-03-15 15:58:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:12,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:12,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:12,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 15:58:12,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:12,840 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:12,840 INFO L85 PathProgramCache]: Analyzing trace with hash 978208761, now seen corresponding path program 93 times [2022-03-15 15:58:12,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:12,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128481962] [2022-03-15 15:58:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:12,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128481962] [2022-03-15 15:58:12,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128481962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:12,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944819681] [2022-03-15 15:58:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:12,927 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:12,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 15:58:13,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:58:13,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:13,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:58:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:13,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 15:58:13,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-03-15 15:58:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:58:13,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:13,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2022-03-15 15:58:13,655 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:13,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:13,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 15:58:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 15:58:13,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944819681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:13,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:13,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-15 15:58:13,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29308493] [2022-03-15 15:58:13,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:13,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:58:13,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:58:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:58:13,662 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:14,060 INFO L93 Difference]: Finished difference Result 546 states and 1595 transitions. [2022-03-15 15:58:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:14,061 INFO L225 Difference]: With dead ends: 546 [2022-03-15 15:58:14,061 INFO L226 Difference]: Without dead ends: 444 [2022-03-15 15:58:14,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:14,061 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:14,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 204 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-03-15 15:58:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 304. [2022-03-15 15:58:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-15 15:58:14,065 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-15 15:58:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:14,065 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-15 15:58:14,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-15 15:58:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:14,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:14,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:14,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 15:58:14,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 15:58:14,266 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2067370929, now seen corresponding path program 94 times [2022-03-15 15:58:14,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:14,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648384360] [2022-03-15 15:58:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:14,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:14,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:14,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648384360] [2022-03-15 15:58:14,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648384360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:14,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845458619] [2022-03-15 15:58:14,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:14,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:14,361 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:14,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 15:58:14,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:14,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:14,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:14,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:14,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:14,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:14,907 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:14,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:14,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:14,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845458619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:14,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:14,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:14,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752817652] [2022-03-15 15:58:14,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:14,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:14,918 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:15,570 INFO L93 Difference]: Finished difference Result 708 states and 2027 transitions. [2022-03-15 15:58:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:58:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:15,571 INFO L225 Difference]: With dead ends: 708 [2022-03-15 15:58:15,571 INFO L226 Difference]: Without dead ends: 708 [2022-03-15 15:58:15,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:58:15,571 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:15,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 274 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-03-15 15:58:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 321. [2022-03-15 15:58:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.984375) internal successors, (955), 320 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 955 transitions. [2022-03-15 15:58:15,583 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 955 transitions. Word has length 22 [2022-03-15 15:58:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:15,583 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 955 transitions. [2022-03-15 15:58:15,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 955 transitions. [2022-03-15 15:58:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:15,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:15,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:15,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 15:58:15,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 15:58:15,787 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:15,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1697886599, now seen corresponding path program 95 times [2022-03-15 15:58:15,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:15,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097677040] [2022-03-15 15:58:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:15,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:15,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:15,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097677040] [2022-03-15 15:58:15,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097677040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:15,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95150109] [2022-03-15 15:58:15,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:15,871 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:15,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 15:58:15,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:16,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:16,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:16,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:16,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:16,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:16,373 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:16,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:16,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:16,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95150109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:16,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:16,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:58:16,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627949158] [2022-03-15 15:58:16,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:16,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:16,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:16,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:16,381 INFO L87 Difference]: Start difference. First operand 321 states and 955 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:16,827 INFO L93 Difference]: Finished difference Result 618 states and 1796 transitions. [2022-03-15 15:58:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:16,828 INFO L225 Difference]: With dead ends: 618 [2022-03-15 15:58:16,828 INFO L226 Difference]: Without dead ends: 609 [2022-03-15 15:58:16,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:16,828 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 166 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:16,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 200 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:16,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-03-15 15:58:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 327. [2022-03-15 15:58:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9662576687116564) internal successors, (967), 326 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 967 transitions. [2022-03-15 15:58:16,834 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 967 transitions. Word has length 22 [2022-03-15 15:58:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:16,834 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 967 transitions. [2022-03-15 15:58:16,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 967 transitions. [2022-03-15 15:58:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:16,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:16,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:16,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 15:58:17,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 15:58:17,043 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:17,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1479625607, now seen corresponding path program 96 times [2022-03-15 15:58:17,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:17,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105215164] [2022-03-15 15:58:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:17,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:17,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105215164] [2022-03-15 15:58:17,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105215164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:17,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528826501] [2022-03-15 15:58:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:17,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:17,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:17,148 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:17,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 15:58:17,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:17,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:17,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:17,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:17,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:17,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:17,701 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:17,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:17,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:17,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528826501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:17,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:17,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:17,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86502830] [2022-03-15 15:58:17,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:17,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:17,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:17,709 INFO L87 Difference]: Start difference. First operand 327 states and 967 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:18,168 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2022-03-15 15:58:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:18,169 INFO L225 Difference]: With dead ends: 546 [2022-03-15 15:58:18,169 INFO L226 Difference]: Without dead ends: 546 [2022-03-15 15:58:18,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:18,170 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 148 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:18,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 229 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-15 15:58:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2022-03-15 15:58:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-03-15 15:58:18,174 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-03-15 15:58:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:18,174 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-03-15 15:58:18,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-03-15 15:58:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:18,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:18,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:18,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:18,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 15:58:18,375 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash -553534529, now seen corresponding path program 97 times [2022-03-15 15:58:18,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:18,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292805985] [2022-03-15 15:58:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:18,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:18,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:18,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292805985] [2022-03-15 15:58:18,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292805985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:18,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540936769] [2022-03-15 15:58:18,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:18,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:18,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:18,489 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:18,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 15:58:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:18,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:18,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 15:58:18,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 15:58:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:18,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:19,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:19,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:19,162 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:19,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:19,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:19,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540936769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:19,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:19,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:19,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485126069] [2022-03-15 15:58:19,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:19,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:19,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:19,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:19,169 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:19,765 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2022-03-15 15:58:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:58:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:19,767 INFO L225 Difference]: With dead ends: 733 [2022-03-15 15:58:19,767 INFO L226 Difference]: Without dead ends: 733 [2022-03-15 15:58:19,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:58:19,767 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 228 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:19,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 196 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-15 15:58:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 323. [2022-03-15 15:58:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.012422360248447) internal successors, (970), 322 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 970 transitions. [2022-03-15 15:58:19,772 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 970 transitions. Word has length 22 [2022-03-15 15:58:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:19,772 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 970 transitions. [2022-03-15 15:58:19,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 970 transitions. [2022-03-15 15:58:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:19,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:19,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:19,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 15:58:19,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-15 15:58:19,973 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash 941068435, now seen corresponding path program 98 times [2022-03-15 15:58:19,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:19,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449958381] [2022-03-15 15:58:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:19,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:20,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449958381] [2022-03-15 15:58:20,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449958381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:20,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914776841] [2022-03-15 15:58:20,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:20,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:20,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:20,076 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:20,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 15:58:20,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:20,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:20,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:20,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 15:58:20,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 15:58:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:20,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:20,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:20,694 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:20,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:20,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914776841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:20,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:20,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:20,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861116367] [2022-03-15 15:58:20,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:20,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:20,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:20,701 INFO L87 Difference]: Start difference. First operand 323 states and 970 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:21,212 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2022-03-15 15:58:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:21,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:21,213 INFO L225 Difference]: With dead ends: 767 [2022-03-15 15:58:21,213 INFO L226 Difference]: Without dead ends: 757 [2022-03-15 15:58:21,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:21,214 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 255 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:21,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 154 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-15 15:58:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 330. [2022-03-15 15:58:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2022-03-15 15:58:21,218 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 22 [2022-03-15 15:58:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:21,219 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2022-03-15 15:58:21,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2022-03-15 15:58:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:21,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:21,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:21,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 15:58:21,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:21,420 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1982143627, now seen corresponding path program 99 times [2022-03-15 15:58:21,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:21,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830881758] [2022-03-15 15:58:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:21,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:21,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:21,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830881758] [2022-03-15 15:58:21,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830881758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:21,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212855621] [2022-03-15 15:58:21,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:21,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:21,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:21,520 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:21,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 15:58:21,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:21,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:21,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:21,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 15:58:21,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 15:58:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:21,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:22,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:22,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:22,156 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:22,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:22,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:22,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212855621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:22,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:22,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:22,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964298019] [2022-03-15 15:58:22,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:22,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:22,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:22,163 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:22,827 INFO L93 Difference]: Finished difference Result 820 states and 2355 transitions. [2022-03-15 15:58:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:58:22,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:22,828 INFO L225 Difference]: With dead ends: 820 [2022-03-15 15:58:22,828 INFO L226 Difference]: Without dead ends: 820 [2022-03-15 15:58:22,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:58:22,829 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 254 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:22,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 194 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-03-15 15:58:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 336. [2022-03-15 15:58:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.017910447761194) internal successors, (1011), 335 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1011 transitions. [2022-03-15 15:58:22,834 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1011 transitions. Word has length 22 [2022-03-15 15:58:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:22,834 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1011 transitions. [2022-03-15 15:58:22,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1011 transitions. [2022-03-15 15:58:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:22,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:22,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:22,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-15 15:58:23,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:23,035 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash -94685677, now seen corresponding path program 100 times [2022-03-15 15:58:23,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:23,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387599041] [2022-03-15 15:58:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:23,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:23,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387599041] [2022-03-15 15:58:23,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387599041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:23,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788719163] [2022-03-15 15:58:23,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:23,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:23,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:23,128 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:23,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 15:58:23,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:23,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:23,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:23,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:23,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:23,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 15:58:23,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 15:58:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:23,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:23,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:23,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:23,753 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:23,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:23,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:23,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788719163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:23,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:23,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:23,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558242703] [2022-03-15 15:58:23,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:23,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:23,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:23,760 INFO L87 Difference]: Start difference. First operand 336 states and 1011 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:24,253 INFO L93 Difference]: Finished difference Result 769 states and 2220 transitions. [2022-03-15 15:58:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:24,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:24,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:24,255 INFO L225 Difference]: With dead ends: 769 [2022-03-15 15:58:24,255 INFO L226 Difference]: Without dead ends: 760 [2022-03-15 15:58:24,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:24,255 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 243 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:24,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 184 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-15 15:58:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 342. [2022-03-15 15:58:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0) internal successors, (1023), 341 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1023 transitions. [2022-03-15 15:58:24,260 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1023 transitions. Word has length 22 [2022-03-15 15:58:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:24,260 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1023 transitions. [2022-03-15 15:58:24,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1023 transitions. [2022-03-15 15:58:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:24,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:24,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:24,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 15:58:24,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-15 15:58:24,461 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash 247563817, now seen corresponding path program 101 times [2022-03-15 15:58:24,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:24,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490620071] [2022-03-15 15:58:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:24,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:24,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:24,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490620071] [2022-03-15 15:58:24,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490620071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:24,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661895204] [2022-03-15 15:58:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:24,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:24,544 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:24,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 15:58:24,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:24,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:24,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:24,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 15:58:24,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 15:58:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:24,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:25,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:25,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:25,135 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:25,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:25,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:25,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661895204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:25,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:25,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-15 15:58:25,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638172286] [2022-03-15 15:58:25,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:25,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:58:25,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:58:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:25,143 INFO L87 Difference]: Start difference. First operand 342 states and 1023 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:25,674 INFO L93 Difference]: Finished difference Result 812 states and 2302 transitions. [2022-03-15 15:58:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:25,675 INFO L225 Difference]: With dead ends: 812 [2022-03-15 15:58:25,675 INFO L226 Difference]: Without dead ends: 802 [2022-03-15 15:58:25,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:25,675 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:25,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 225 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-15 15:58:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 354. [2022-03-15 15:58:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0056657223796033) internal successors, (1061), 353 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1061 transitions. [2022-03-15 15:58:25,680 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1061 transitions. Word has length 22 [2022-03-15 15:58:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:25,680 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1061 transitions. [2022-03-15 15:58:25,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1061 transitions. [2022-03-15 15:58:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:25,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:25,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:25,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 15:58:25,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-15 15:58:25,882 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1333208099, now seen corresponding path program 102 times [2022-03-15 15:58:25,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:25,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408238574] [2022-03-15 15:58:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:25,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:25,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408238574] [2022-03-15 15:58:25,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408238574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:25,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594494203] [2022-03-15 15:58:25,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:25,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:25,968 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:25,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 15:58:26,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:58:26,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:26,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:26,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 15:58:26,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 15:58:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:26,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:26,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:26,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:26,545 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:26,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:26,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:26,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594494203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:26,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:26,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-15 15:58:26,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135791531] [2022-03-15 15:58:26,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:26,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 15:58:26,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 15:58:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:58:26,552 INFO L87 Difference]: Start difference. First operand 354 states and 1061 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:26,943 INFO L93 Difference]: Finished difference Result 726 states and 2094 transitions. [2022-03-15 15:58:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:26,945 INFO L225 Difference]: With dead ends: 726 [2022-03-15 15:58:26,945 INFO L226 Difference]: Without dead ends: 714 [2022-03-15 15:58:26,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:58:26,945 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:26,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 148 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-15 15:58:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 350. [2022-03-15 15:58:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.005730659025788) internal successors, (1049), 349 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1049 transitions. [2022-03-15 15:58:26,950 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1049 transitions. Word has length 22 [2022-03-15 15:58:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:26,950 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1049 transitions. [2022-03-15 15:58:26,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1049 transitions. [2022-03-15 15:58:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:26,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:26,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:26,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:27,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:27,151 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1614312619, now seen corresponding path program 103 times [2022-03-15 15:58:27,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:27,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015628239] [2022-03-15 15:58:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:27,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:27,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015628239] [2022-03-15 15:58:27,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015628239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:27,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992631824] [2022-03-15 15:58:27,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:27,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:27,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:27,246 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:27,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 15:58:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:27,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:27,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:27,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-03-15 15:58:27,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-15 15:58:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:27,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:27,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:27,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:27,869 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:27,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:27,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:27,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992631824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:27,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:27,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:27,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498246970] [2022-03-15 15:58:27,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:27,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:27,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:27,876 INFO L87 Difference]: Start difference. First operand 350 states and 1049 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:28,389 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2022-03-15 15:58:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:28,390 INFO L225 Difference]: With dead ends: 689 [2022-03-15 15:58:28,390 INFO L226 Difference]: Without dead ends: 689 [2022-03-15 15:58:28,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:58:28,391 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 170 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:28,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 195 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-03-15 15:58:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 355. [2022-03-15 15:58:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0) internal successors, (1062), 354 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1062 transitions. [2022-03-15 15:58:28,396 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1062 transitions. Word has length 22 [2022-03-15 15:58:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:28,396 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1062 transitions. [2022-03-15 15:58:28,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1062 transitions. [2022-03-15 15:58:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:28,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:28,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:28,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 15:58:28,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:28,597 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash -119709655, now seen corresponding path program 104 times [2022-03-15 15:58:28,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:28,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612308483] [2022-03-15 15:58:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:28,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:28,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:28,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612308483] [2022-03-15 15:58:28,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612308483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:28,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722633847] [2022-03-15 15:58:28,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:28,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:28,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:28,712 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:28,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 15:58:28,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:28,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:28,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:29,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-03-15 15:58:29,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 15:58:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:29,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:29,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:29,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:29,339 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:29,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:29,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:29,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722633847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:29,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:29,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:29,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134894852] [2022-03-15 15:58:29,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:29,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:29,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:29,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:29,346 INFO L87 Difference]: Start difference. First operand 355 states and 1062 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:29,763 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2022-03-15 15:58:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:29,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:29,764 INFO L225 Difference]: With dead ends: 680 [2022-03-15 15:58:29,764 INFO L226 Difference]: Without dead ends: 670 [2022-03-15 15:58:29,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:29,765 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:29,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 195 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-03-15 15:58:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 334. [2022-03-15 15:58:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.96996996996997) internal successors, (989), 333 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 989 transitions. [2022-03-15 15:58:29,769 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 989 transitions. Word has length 22 [2022-03-15 15:58:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:29,769 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 989 transitions. [2022-03-15 15:58:29,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 989 transitions. [2022-03-15 15:58:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:29,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:29,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:29,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 15:58:29,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 15:58:29,970 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -645629941, now seen corresponding path program 105 times [2022-03-15 15:58:29,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:29,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129979989] [2022-03-15 15:58:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:30,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:30,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129979989] [2022-03-15 15:58:30,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129979989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:30,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94555501] [2022-03-15 15:58:30,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:30,068 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:30,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 15:58:30,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:58:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:30,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:30,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:30,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:30,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:30,705 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:30,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:30,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:30,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94555501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:30,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:30,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:30,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417461747] [2022-03-15 15:58:30,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:30,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:30,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:30,712 INFO L87 Difference]: Start difference. First operand 334 states and 989 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:31,161 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2022-03-15 15:58:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:31,162 INFO L225 Difference]: With dead ends: 594 [2022-03-15 15:58:31,162 INFO L226 Difference]: Without dead ends: 594 [2022-03-15 15:58:31,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:31,162 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:31,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 222 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:31,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-15 15:58:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2022-03-15 15:58:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2022-03-15 15:58:31,166 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2022-03-15 15:58:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:31,166 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2022-03-15 15:58:31,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2022-03-15 15:58:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:31,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:31,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:31,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 15:58:31,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 15:58:31,368 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash -139412553, now seen corresponding path program 106 times [2022-03-15 15:58:31,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:31,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220781169] [2022-03-15 15:58:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:31,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:31,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220781169] [2022-03-15 15:58:31,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220781169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:31,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642386991] [2022-03-15 15:58:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:31,462 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:31,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 15:58:31,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:31,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:31,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:31,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:31,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:31,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:31,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:32,031 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:32,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:32,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:32,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642386991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:32,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:32,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:32,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954716252] [2022-03-15 15:58:32,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:32,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:32,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:32,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:32,039 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:32,526 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2022-03-15 15:58:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:32,527 INFO L225 Difference]: With dead ends: 655 [2022-03-15 15:58:32,527 INFO L226 Difference]: Without dead ends: 655 [2022-03-15 15:58:32,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:32,527 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:32,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 186 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-15 15:58:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 339. [2022-03-15 15:58:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9822485207100593) internal successors, (1008), 338 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1008 transitions. [2022-03-15 15:58:32,532 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1008 transitions. Word has length 22 [2022-03-15 15:58:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:32,532 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1008 transitions. [2022-03-15 15:58:32,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1008 transitions. [2022-03-15 15:58:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:32,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:32,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:32,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-15 15:58:32,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 15:58:32,733 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2078725439, now seen corresponding path program 107 times [2022-03-15 15:58:32,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:32,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476194865] [2022-03-15 15:58:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:32,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:32,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476194865] [2022-03-15 15:58:32,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476194865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:32,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669965448] [2022-03-15 15:58:32,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:32,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:32,821 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:32,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 15:58:32,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:32,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:32,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:32,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:33,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:33,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:33,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:33,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:33,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:33,403 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:33,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:33,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:33,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669965448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:33,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:33,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:58:33,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749149225] [2022-03-15 15:58:33,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:33,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:58:33,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:58:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:58:33,410 INFO L87 Difference]: Start difference. First operand 339 states and 1008 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:33,884 INFO L93 Difference]: Finished difference Result 637 states and 1840 transitions. [2022-03-15 15:58:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:33,885 INFO L225 Difference]: With dead ends: 637 [2022-03-15 15:58:33,885 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 15:58:33,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:33,886 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:33,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 229 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 15:58:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 339. [2022-03-15 15:58:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9526627218934913) internal successors, (998), 338 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 998 transitions. [2022-03-15 15:58:33,890 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 998 transitions. Word has length 22 [2022-03-15 15:58:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:33,890 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 998 transitions. [2022-03-15 15:58:33,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:33,890 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 998 transitions. [2022-03-15 15:58:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:33,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:33,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:33,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 15:58:34,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:34,095 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:34,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2043126113, now seen corresponding path program 108 times [2022-03-15 15:58:34,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:34,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950020032] [2022-03-15 15:58:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:34,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:34,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950020032] [2022-03-15 15:58:34,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950020032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:34,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239477599] [2022-03-15 15:58:34,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:34,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:34,212 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:34,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 15:58:34,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:34,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:34,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:34,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:58:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:34,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:34,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:34,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 15:58:34,851 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:34,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:34,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:34,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239477599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:34,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:34,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:34,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618197151] [2022-03-15 15:58:34,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:34,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:34,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:34,860 INFO L87 Difference]: Start difference. First operand 339 states and 998 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:35,314 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2022-03-15 15:58:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:35,315 INFO L225 Difference]: With dead ends: 565 [2022-03-15 15:58:35,315 INFO L226 Difference]: Without dead ends: 565 [2022-03-15 15:58:35,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:35,315 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:35,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 226 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-15 15:58:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 309. [2022-03-15 15:58:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-03-15 15:58:35,321 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-03-15 15:58:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:35,321 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-03-15 15:58:35,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-03-15 15:58:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:35,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:35,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:35,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:35,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 15:58:35,539 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash -41099855, now seen corresponding path program 109 times [2022-03-15 15:58:35,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:35,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283964948] [2022-03-15 15:58:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:35,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:35,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:35,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283964948] [2022-03-15 15:58:35,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283964948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:35,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858930487] [2022-03-15 15:58:35,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:35,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:35,623 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:35,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 15:58:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:35,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:36,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:58:36,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:58:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:36,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:36,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:36,400 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:36,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:36,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858930487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:36,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:36,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:36,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661676433] [2022-03-15 15:58:36,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:36,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:36,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:36,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:36,408 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:36,794 INFO L93 Difference]: Finished difference Result 477 states and 1389 transitions. [2022-03-15 15:58:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:36,796 INFO L225 Difference]: With dead ends: 477 [2022-03-15 15:58:36,796 INFO L226 Difference]: Without dead ends: 477 [2022-03-15 15:58:36,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:36,796 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:36,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 224 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-15 15:58:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 319. [2022-03-15 15:58:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9779874213836477) internal successors, (947), 318 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 947 transitions. [2022-03-15 15:58:36,801 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 947 transitions. Word has length 22 [2022-03-15 15:58:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:36,801 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 947 transitions. [2022-03-15 15:58:36,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 947 transitions. [2022-03-15 15:58:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:36,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:36,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:36,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 15:58:37,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-15 15:58:37,003 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1453503109, now seen corresponding path program 110 times [2022-03-15 15:58:37,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:37,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577607666] [2022-03-15 15:58:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:37,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:37,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577607666] [2022-03-15 15:58:37,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577607666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:37,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81829087] [2022-03-15 15:58:37,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:37,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:37,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:37,086 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:37,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 15:58:37,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:37,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:37,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:37,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:37,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:58:37,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:58:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:37,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:37,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:37,861 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:37,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:37,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81829087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:37,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:37,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:37,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772937907] [2022-03-15 15:58:37,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:37,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:37,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:37,877 INFO L87 Difference]: Start difference. First operand 319 states and 947 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:38,311 INFO L93 Difference]: Finished difference Result 504 states and 1456 transitions. [2022-03-15 15:58:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:38,312 INFO L225 Difference]: With dead ends: 504 [2022-03-15 15:58:38,312 INFO L226 Difference]: Without dead ends: 494 [2022-03-15 15:58:38,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:38,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 162 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:38,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 209 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-03-15 15:58:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 316. [2022-03-15 15:58:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.9682539682539684) internal successors, (935), 315 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 935 transitions. [2022-03-15 15:58:38,316 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 935 transitions. Word has length 22 [2022-03-15 15:58:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:38,316 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 935 transitions. [2022-03-15 15:58:38,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 935 transitions. [2022-03-15 15:58:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:38,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:38,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:38,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 15:58:38,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-15 15:58:38,517 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1878450319, now seen corresponding path program 111 times [2022-03-15 15:58:38,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:38,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611134980] [2022-03-15 15:58:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:38,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611134980] [2022-03-15 15:58:38,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611134980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:38,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907593090] [2022-03-15 15:58:38,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:38,591 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:38,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 15:58:38,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:58:38,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:38,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:38,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:39,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:39,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:39,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:39,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:39,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907593090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:39,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:39,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:39,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67895030] [2022-03-15 15:58:39,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:39,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:39,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:39,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:39,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:39,268 INFO L87 Difference]: Start difference. First operand 316 states and 935 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:39,688 INFO L93 Difference]: Finished difference Result 465 states and 1354 transitions. [2022-03-15 15:58:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:39,689 INFO L225 Difference]: With dead ends: 465 [2022-03-15 15:58:39,689 INFO L226 Difference]: Without dead ends: 445 [2022-03-15 15:58:39,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:39,689 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:39,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-03-15 15:58:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 313. [2022-03-15 15:58:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9583333333333335) internal successors, (923), 312 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 923 transitions. [2022-03-15 15:58:39,692 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 923 transitions. Word has length 22 [2022-03-15 15:58:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:39,693 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 923 transitions. [2022-03-15 15:58:39,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 923 transitions. [2022-03-15 15:58:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:39,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:39,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:39,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:39,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 15:58:39,894 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:39,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1255511653, now seen corresponding path program 112 times [2022-03-15 15:58:39,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:39,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125165579] [2022-03-15 15:58:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:39,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:39,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125165579] [2022-03-15 15:58:39,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125165579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:39,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012146994] [2022-03-15 15:58:39,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:39,994 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:39,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 15:58:40,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:40,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:40,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:40,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:58:40,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:58:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:40,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:40,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:40,685 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:40,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:40,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012146994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:40,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:40,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:40,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4796988] [2022-03-15 15:58:40,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:40,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:40,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:40,693 INFO L87 Difference]: Start difference. First operand 313 states and 923 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:41,093 INFO L93 Difference]: Finished difference Result 595 states and 1725 transitions. [2022-03-15 15:58:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:41,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:41,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:41,094 INFO L225 Difference]: With dead ends: 595 [2022-03-15 15:58:41,094 INFO L226 Difference]: Without dead ends: 595 [2022-03-15 15:58:41,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:41,095 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:41,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 206 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-15 15:58:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 323. [2022-03-15 15:58:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.012422360248447) internal successors, (970), 322 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 970 transitions. [2022-03-15 15:58:41,099 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 970 transitions. Word has length 22 [2022-03-15 15:58:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:41,099 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 970 transitions. [2022-03-15 15:58:41,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 970 transitions. [2022-03-15 15:58:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:41,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:41,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:41,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 15:58:41,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:41,300 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1544852679, now seen corresponding path program 113 times [2022-03-15 15:58:41,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:41,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364350101] [2022-03-15 15:58:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:41,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:41,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364350101] [2022-03-15 15:58:41,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364350101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:41,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522857715] [2022-03-15 15:58:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:41,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:41,405 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:41,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 15:58:41,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:41,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:41,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:58:41,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:58:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:41,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:41,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:42,131 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:42,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:42,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:42,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522857715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:42,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:42,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:42,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539734929] [2022-03-15 15:58:42,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:42,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:42,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:42,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:42,138 INFO L87 Difference]: Start difference. First operand 323 states and 970 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:42,674 INFO L93 Difference]: Finished difference Result 642 states and 1842 transitions. [2022-03-15 15:58:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:42,675 INFO L225 Difference]: With dead ends: 642 [2022-03-15 15:58:42,676 INFO L226 Difference]: Without dead ends: 632 [2022-03-15 15:58:42,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:42,676 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 233 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:42,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 249 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-15 15:58:42,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 330. [2022-03-15 15:58:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2022-03-15 15:58:42,680 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 22 [2022-03-15 15:58:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:42,680 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2022-03-15 15:58:42,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2022-03-15 15:58:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:42,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:42,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:42,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:42,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:42,881 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:42,881 INFO L85 PathProgramCache]: Analyzing trace with hash -503777487, now seen corresponding path program 114 times [2022-03-15 15:58:42,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:42,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689538314] [2022-03-15 15:58:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:42,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:42,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:42,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689538314] [2022-03-15 15:58:42,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689538314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:42,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459132084] [2022-03-15 15:58:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:42,967 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:42,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 15:58:43,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:43,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:43,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:43,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:58:43,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:58:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:43,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:43,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:43,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:43,652 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:43,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:43,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:43,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459132084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:43,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:43,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:43,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171836499] [2022-03-15 15:58:43,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:43,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:43,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:43,660 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:43,993 INFO L93 Difference]: Finished difference Result 603 states and 1720 transitions. [2022-03-15 15:58:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:43,994 INFO L225 Difference]: With dead ends: 603 [2022-03-15 15:58:43,994 INFO L226 Difference]: Without dead ends: 603 [2022-03-15 15:58:43,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:43,995 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:43,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 175 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-15 15:58:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 321. [2022-03-15 15:58:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.996875) internal successors, (959), 320 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 959 transitions. [2022-03-15 15:58:43,999 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 959 transitions. Word has length 22 [2022-03-15 15:58:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:43,999 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 959 transitions. [2022-03-15 15:58:43,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 959 transitions. [2022-03-15 15:58:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:44,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:44,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:44,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 15:58:44,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:44,200 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1714360505, now seen corresponding path program 115 times [2022-03-15 15:58:44,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:44,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536345946] [2022-03-15 15:58:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:44,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536345946] [2022-03-15 15:58:44,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536345946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:44,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033284739] [2022-03-15 15:58:44,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:44,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:44,288 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:44,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 15:58:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:44,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:44,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:58:44,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:58:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:44,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:44,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:45,034 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:45,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:45,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033284739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:45,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:45,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:45,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561893549] [2022-03-15 15:58:45,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:45,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:45,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:45,042 INFO L87 Difference]: Start difference. First operand 321 states and 959 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:45,382 INFO L93 Difference]: Finished difference Result 547 states and 1570 transitions. [2022-03-15 15:58:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:45,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:45,383 INFO L225 Difference]: With dead ends: 547 [2022-03-15 15:58:45,383 INFO L226 Difference]: Without dead ends: 538 [2022-03-15 15:58:45,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:45,384 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:45,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 209 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-15 15:58:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 327. [2022-03-15 15:58:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.978527607361963) internal successors, (971), 326 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 971 transitions. [2022-03-15 15:58:45,388 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 971 transitions. Word has length 22 [2022-03-15 15:58:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:45,388 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 971 transitions. [2022-03-15 15:58:45,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 971 transitions. [2022-03-15 15:58:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:45,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:45,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:45,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:45,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 15:58:45,589 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2056609999, now seen corresponding path program 116 times [2022-03-15 15:58:45,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:45,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383481570] [2022-03-15 15:58:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:45,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383481570] [2022-03-15 15:58:45,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383481570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:45,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243110076] [2022-03-15 15:58:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:45,668 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:45,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 15:58:45,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:45,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:45,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:46,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:58:46,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:58:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:46,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:46,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:46,311 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:46,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:46,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243110076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:46,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:46,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:58:46,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10623250] [2022-03-15 15:58:46,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:46,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:46,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:46,319 INFO L87 Difference]: Start difference. First operand 327 states and 971 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:46,814 INFO L93 Difference]: Finished difference Result 640 states and 1787 transitions. [2022-03-15 15:58:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:58:46,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:46,815 INFO L225 Difference]: With dead ends: 640 [2022-03-15 15:58:46,815 INFO L226 Difference]: Without dead ends: 630 [2022-03-15 15:58:46,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:46,815 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 199 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:46,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 205 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-15 15:58:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 349. [2022-03-15 15:58:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9741379310344827) internal successors, (1035), 348 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1035 transitions. [2022-03-15 15:58:46,820 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1035 transitions. Word has length 22 [2022-03-15 15:58:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:46,820 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1035 transitions. [2022-03-15 15:58:46,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1035 transitions. [2022-03-15 15:58:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:46,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:46,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:46,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 15:58:47,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 15:58:47,021 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash 475838083, now seen corresponding path program 117 times [2022-03-15 15:58:47,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:47,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750166701] [2022-03-15 15:58:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:47,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:47,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750166701] [2022-03-15 15:58:47,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750166701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:47,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896758138] [2022-03-15 15:58:47,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:47,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:47,121 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:47,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 15:58:47,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:47,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:47,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:58:47,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:58:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:47,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:47,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:47,777 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:47,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:47,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:47,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896758138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:47,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:47,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:58:47,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416972882] [2022-03-15 15:58:47,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:47,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:47,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:47,784 INFO L87 Difference]: Start difference. First operand 349 states and 1035 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:48,208 INFO L93 Difference]: Finished difference Result 597 states and 1676 transitions. [2022-03-15 15:58:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:48,210 INFO L225 Difference]: With dead ends: 597 [2022-03-15 15:58:48,210 INFO L226 Difference]: Without dead ends: 585 [2022-03-15 15:58:48,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:48,210 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:48,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 209 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-15 15:58:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 329. [2022-03-15 15:58:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2022-03-15 15:58:48,214 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 22 [2022-03-15 15:58:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:48,214 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2022-03-15 15:58:48,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2022-03-15 15:58:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:48,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:48,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:48,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 15:58:48,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 15:58:48,415 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:48,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1854643641, now seen corresponding path program 118 times [2022-03-15 15:58:48,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:48,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403386617] [2022-03-15 15:58:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:48,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:48,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403386617] [2022-03-15 15:58:48,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403386617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:48,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797650790] [2022-03-15 15:58:48,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:48,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:48,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:48,489 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:48,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 15:58:48,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:48,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:48,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:48,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:49,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:49,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:49,138 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:49,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:49,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797650790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:49,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:49,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:49,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155251079] [2022-03-15 15:58:49,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:49,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:49,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:49,146 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:49,501 INFO L93 Difference]: Finished difference Result 465 states and 1359 transitions. [2022-03-15 15:58:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:49,502 INFO L225 Difference]: With dead ends: 465 [2022-03-15 15:58:49,502 INFO L226 Difference]: Without dead ends: 445 [2022-03-15 15:58:49,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:49,503 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:49,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 159 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-03-15 15:58:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 335. [2022-03-15 15:58:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9580838323353293) internal successors, (988), 334 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 988 transitions. [2022-03-15 15:58:49,506 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 988 transitions. Word has length 22 [2022-03-15 15:58:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:49,506 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 988 transitions. [2022-03-15 15:58:49,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 988 transitions. [2022-03-15 15:58:49,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:49,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:49,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:49,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 15:58:49,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 15:58:49,707 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash 95354501, now seen corresponding path program 119 times [2022-03-15 15:58:49,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:49,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469179865] [2022-03-15 15:58:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:49,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:49,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469179865] [2022-03-15 15:58:49,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469179865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:49,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892058151] [2022-03-15 15:58:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:49,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:49,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:49,783 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:49,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 15:58:49,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:50,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:50,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 15:58:50,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 15:58:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:50,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:50,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:50,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:50,399 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:50,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:50,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:50,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892058151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:50,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:50,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:58:50,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270167370] [2022-03-15 15:58:50,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:50,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:50,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:50,406 INFO L87 Difference]: Start difference. First operand 335 states and 988 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:50,913 INFO L93 Difference]: Finished difference Result 543 states and 1537 transitions. [2022-03-15 15:58:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:50,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:50,914 INFO L225 Difference]: With dead ends: 543 [2022-03-15 15:58:50,914 INFO L226 Difference]: Without dead ends: 533 [2022-03-15 15:58:50,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:50,915 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:50,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 251 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-15 15:58:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 357. [2022-03-15 15:58:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2022-03-15 15:58:50,919 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2022-03-15 15:58:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:50,919 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2022-03-15 15:58:50,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2022-03-15 15:58:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:50,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:50,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:50,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 15:58:51,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-15 15:58:51,121 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1485417415, now seen corresponding path program 120 times [2022-03-15 15:58:51,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:51,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901488675] [2022-03-15 15:58:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:51,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901488675] [2022-03-15 15:58:51,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901488675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:51,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952790516] [2022-03-15 15:58:51,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:51,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:51,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:51,196 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:51,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 15:58:51,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:51,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:51,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:58:51,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 15:58:51,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 15:58:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:51,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:51,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:58:51,792 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:51,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:51,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952790516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:51,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:51,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:58:51,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585993390] [2022-03-15 15:58:51,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:51,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:58:51,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:58:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:58:51,800 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:52,158 INFO L93 Difference]: Finished difference Result 500 states and 1426 transitions. [2022-03-15 15:58:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:52,158 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:52,159 INFO L225 Difference]: With dead ends: 500 [2022-03-15 15:58:52,159 INFO L226 Difference]: Without dead ends: 485 [2022-03-15 15:58:52,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:52,159 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:52,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 185 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-15 15:58:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 331. [2022-03-15 15:58:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2022-03-15 15:58:52,163 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2022-03-15 15:58:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:52,163 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2022-03-15 15:58:52,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2022-03-15 15:58:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:52,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:52,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:52,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 15:58:52,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:52,364 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1434517723, now seen corresponding path program 121 times [2022-03-15 15:58:52,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:52,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472843550] [2022-03-15 15:58:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:52,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472843550] [2022-03-15 15:58:52,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472843550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:52,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704599394] [2022-03-15 15:58:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:52,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:52,457 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:52,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 15:58:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:52,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:52,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:52,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:58:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:52,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:52,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:53,082 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:53,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:53,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704599394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:53,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:53,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:53,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827570602] [2022-03-15 15:58:53,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:53,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:53,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:53,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:53,090 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:53,461 INFO L93 Difference]: Finished difference Result 460 states and 1324 transitions. [2022-03-15 15:58:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:53,462 INFO L225 Difference]: With dead ends: 460 [2022-03-15 15:58:53,462 INFO L226 Difference]: Without dead ends: 460 [2022-03-15 15:58:53,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:53,462 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:53,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 241 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-15 15:58:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 334. [2022-03-15 15:58:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.951951951951952) internal successors, (983), 333 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 983 transitions. [2022-03-15 15:58:53,466 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 983 transitions. Word has length 22 [2022-03-15 15:58:53,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:53,466 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 983 transitions. [2022-03-15 15:58:53,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 983 transitions. [2022-03-15 15:58:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:53,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:53,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:53,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 15:58:53,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:53,667 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1365846609, now seen corresponding path program 122 times [2022-03-15 15:58:53,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:53,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259634065] [2022-03-15 15:58:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:53,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:53,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259634065] [2022-03-15 15:58:53,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259634065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:53,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020633231] [2022-03-15 15:58:53,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:53,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:53,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:53,767 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:53,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 15:58:53,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:53,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:54,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:58:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:54,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:54,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:54,381 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:54,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:54,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020633231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:54,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:54,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:54,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549471882] [2022-03-15 15:58:54,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:54,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:54,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:54,388 INFO L87 Difference]: Start difference. First operand 334 states and 983 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:54,741 INFO L93 Difference]: Finished difference Result 487 states and 1388 transitions. [2022-03-15 15:58:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:54,742 INFO L225 Difference]: With dead ends: 487 [2022-03-15 15:58:54,742 INFO L226 Difference]: Without dead ends: 477 [2022-03-15 15:58:54,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:54,742 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:54,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 186 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-15 15:58:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 331. [2022-03-15 15:58:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9424242424242424) internal successors, (971), 330 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 971 transitions. [2022-03-15 15:58:54,746 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 971 transitions. Word has length 22 [2022-03-15 15:58:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:54,746 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 971 transitions. [2022-03-15 15:58:54,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 971 transitions. [2022-03-15 15:58:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:54,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:54,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:54,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:54,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:54,948 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -940899399, now seen corresponding path program 123 times [2022-03-15 15:58:54,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:54,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012655024] [2022-03-15 15:58:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:55,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012655024] [2022-03-15 15:58:55,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012655024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:55,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100891305] [2022-03-15 15:58:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:55,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:55,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:55,022 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:55,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 15:58:55,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:58:55,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:55,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:55,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:55,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:55,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:58:55,606 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:55,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:55,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100891305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:55,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:55,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:55,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498948182] [2022-03-15 15:58:55,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:55,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:55,614 INFO L87 Difference]: Start difference. First operand 331 states and 971 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:55,969 INFO L93 Difference]: Finished difference Result 438 states and 1272 transitions. [2022-03-15 15:58:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:55,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:55,970 INFO L225 Difference]: With dead ends: 438 [2022-03-15 15:58:55,970 INFO L226 Difference]: Without dead ends: 418 [2022-03-15 15:58:55,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:58:55,970 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:55,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 217 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-15 15:58:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 313. [2022-03-15 15:58:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9455128205128207) internal successors, (919), 312 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 919 transitions. [2022-03-15 15:58:55,974 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 919 transitions. Word has length 22 [2022-03-15 15:58:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:55,974 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 919 transitions. [2022-03-15 15:58:55,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 919 transitions. [2022-03-15 15:58:55,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:55,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:55,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:55,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-15 15:58:56,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:56,175 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:56,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1398909669, now seen corresponding path program 124 times [2022-03-15 15:58:56,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:56,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962377189] [2022-03-15 15:58:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:56,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:56,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:56,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962377189] [2022-03-15 15:58:56,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962377189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:56,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248198457] [2022-03-15 15:58:56,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:56,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:56,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:56,264 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:56,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 15:58:56,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:56,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:56,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:56,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:56,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:56,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:58:56,853 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:56,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:56,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:56,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248198457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:56,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:56,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:56,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802729833] [2022-03-15 15:58:56,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:56,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:56,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:56,860 INFO L87 Difference]: Start difference. First operand 313 states and 919 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:57,193 INFO L93 Difference]: Finished difference Result 519 states and 1508 transitions. [2022-03-15 15:58:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:57,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:57,194 INFO L225 Difference]: With dead ends: 519 [2022-03-15 15:58:57,195 INFO L226 Difference]: Without dead ends: 519 [2022-03-15 15:58:57,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:57,195 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:57,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 164 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-15 15:58:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 325. [2022-03-15 15:58:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.984567901234568) internal successors, (967), 324 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 967 transitions. [2022-03-15 15:58:57,199 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 967 transitions. Word has length 22 [2022-03-15 15:58:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:57,199 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 967 transitions. [2022-03-15 15:58:57,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 967 transitions. [2022-03-15 15:58:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:57,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:57,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:57,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:57,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:57,400 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1401454663, now seen corresponding path program 125 times [2022-03-15 15:58:57,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:57,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506873169] [2022-03-15 15:58:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:57,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506873169] [2022-03-15 15:58:57,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506873169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:57,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977745358] [2022-03-15 15:58:57,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:57,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:57,486 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:57,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 15:58:57,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:57,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:57,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:57,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:57,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:58:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:57,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:57,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:58:58,048 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:58,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:58,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:58,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977745358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:58,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:58,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:58:58,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805242277] [2022-03-15 15:58:58,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:58,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:58:58,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:58,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:58:58,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:58:58,055 INFO L87 Difference]: Start difference. First operand 325 states and 967 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:58,407 INFO L93 Difference]: Finished difference Result 491 states and 1422 transitions. [2022-03-15 15:58:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:58,408 INFO L225 Difference]: With dead ends: 491 [2022-03-15 15:58:58,408 INFO L226 Difference]: Without dead ends: 481 [2022-03-15 15:58:58,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:58,408 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:58,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 202 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-15 15:58:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 332. [2022-03-15 15:58:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9637462235649545) internal successors, (981), 331 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 981 transitions. [2022-03-15 15:58:58,413 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 981 transitions. Word has length 22 [2022-03-15 15:58:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:58,414 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 981 transitions. [2022-03-15 15:58:58,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 981 transitions. [2022-03-15 15:58:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:58,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:58,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:58,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 15:58:58,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:58,627 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1720566983, now seen corresponding path program 126 times [2022-03-15 15:58:58,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:58,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973389573] [2022-03-15 15:58:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:58,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:58,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:58,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973389573] [2022-03-15 15:58:58,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973389573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:58,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460002171] [2022-03-15 15:58:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:58,718 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:58,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 15:58:58,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:58:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:58:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:59,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:59,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:58:59,299 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:58:59,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:58:59,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:58:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460002171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:59,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:59,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:58:59,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032092713] [2022-03-15 15:58:59,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:59,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:58:59,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:59,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:58:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:58:59,306 INFO L87 Difference]: Start difference. First operand 332 states and 981 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:59,654 INFO L93 Difference]: Finished difference Result 419 states and 1236 transitions. [2022-03-15 15:58:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:58:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:59,655 INFO L225 Difference]: With dead ends: 419 [2022-03-15 15:58:59,655 INFO L226 Difference]: Without dead ends: 419 [2022-03-15 15:58:59,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:59,655 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:59,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 211 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:58:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-15 15:58:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 310. [2022-03-15 15:58:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2022-03-15 15:58:59,664 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 22 [2022-03-15 15:58:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:59,664 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2022-03-15 15:58:59,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2022-03-15 15:58:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:58:59,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:59,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:59,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-15 15:58:59,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:59,865 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:58:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:59,866 INFO L85 PathProgramCache]: Analyzing trace with hash -88220487, now seen corresponding path program 127 times [2022-03-15 15:58:59,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:59,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442182998] [2022-03-15 15:58:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:59,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:59,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442182998] [2022-03-15 15:58:59,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442182998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:59,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521687656] [2022-03-15 15:58:59,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:59,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:59,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:59,956 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:59,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 15:59:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:00,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:00,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 15:59:00,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 15:59:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:00,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:00,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:00,630 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:00,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:00,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521687656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:00,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:00,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:00,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562885705] [2022-03-15 15:59:00,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:00,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:00,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:00,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:00,638 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:01,042 INFO L93 Difference]: Finished difference Result 600 states and 1741 transitions. [2022-03-15 15:59:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:01,043 INFO L225 Difference]: With dead ends: 600 [2022-03-15 15:59:01,043 INFO L226 Difference]: Without dead ends: 600 [2022-03-15 15:59:01,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:01,043 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 212 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:01,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 172 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-03-15 15:59:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 324. [2022-03-15 15:59:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.0123839009287927) internal successors, (973), 323 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 973 transitions. [2022-03-15 15:59:01,047 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 973 transitions. Word has length 22 [2022-03-15 15:59:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:01,048 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 973 transitions. [2022-03-15 15:59:01,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 973 transitions. [2022-03-15 15:59:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:01,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:01,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:01,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:01,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-15 15:59:01,267 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1406382477, now seen corresponding path program 128 times [2022-03-15 15:59:01,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:01,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799853197] [2022-03-15 15:59:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:01,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:01,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:01,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799853197] [2022-03-15 15:59:01,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799853197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:01,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345644398] [2022-03-15 15:59:01,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:01,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:01,357 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:01,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 15:59:01,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:01,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:01,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:01,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:01,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:01,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 15:59:01,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 15:59:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:01,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:01,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:01,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:02,041 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:02,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:02,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345644398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:02,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:02,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:02,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230567516] [2022-03-15 15:59:02,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:02,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:02,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:02,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:02,049 INFO L87 Difference]: Start difference. First operand 324 states and 973 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:02,471 INFO L93 Difference]: Finished difference Result 615 states and 1762 transitions. [2022-03-15 15:59:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:59:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:02,472 INFO L225 Difference]: With dead ends: 615 [2022-03-15 15:59:02,472 INFO L226 Difference]: Without dead ends: 605 [2022-03-15 15:59:02,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:02,473 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:02,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 232 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-03-15 15:59:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 331. [2022-03-15 15:59:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9909090909090907) internal successors, (987), 330 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 987 transitions. [2022-03-15 15:59:02,477 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 987 transitions. Word has length 22 [2022-03-15 15:59:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:02,477 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 987 transitions. [2022-03-15 15:59:02,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 987 transitions. [2022-03-15 15:59:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:02,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:02,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:02,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-15 15:59:02,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-15 15:59:02,678 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:02,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:02,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1847509627, now seen corresponding path program 129 times [2022-03-15 15:59:02,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:02,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814600928] [2022-03-15 15:59:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:02,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:02,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814600928] [2022-03-15 15:59:02,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814600928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:02,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580569974] [2022-03-15 15:59:02,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:02,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:02,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:02,771 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:02,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 15:59:02,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:02,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:03,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:03,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 15:59:03,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 15:59:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:03,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:03,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:03,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:03,467 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:03,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:03,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:03,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580569974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:03,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:03,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:03,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995615109] [2022-03-15 15:59:03,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:03,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:03,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:03,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:03,474 INFO L87 Difference]: Start difference. First operand 331 states and 987 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:04,012 INFO L93 Difference]: Finished difference Result 684 states and 1957 transitions. [2022-03-15 15:59:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:59:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:04,013 INFO L225 Difference]: With dead ends: 684 [2022-03-15 15:59:04,013 INFO L226 Difference]: Without dead ends: 684 [2022-03-15 15:59:04,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:04,013 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 188 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:04,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 226 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:04,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-15 15:59:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 337. [2022-03-15 15:59:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.017857142857143) internal successors, (1014), 336 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1014 transitions. [2022-03-15 15:59:04,020 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1014 transitions. Word has length 22 [2022-03-15 15:59:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:04,020 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1014 transitions. [2022-03-15 15:59:04,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1014 transitions. [2022-03-15 15:59:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:04,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:04,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:04,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:04,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-15 15:59:04,244 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash 370628365, now seen corresponding path program 130 times [2022-03-15 15:59:04,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:04,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342882532] [2022-03-15 15:59:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:04,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:04,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:04,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342882532] [2022-03-15 15:59:04,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342882532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:04,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316723676] [2022-03-15 15:59:04,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:04,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:04,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:04,330 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:04,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 15:59:04,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:04,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:04,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:04,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 15:59:04,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 15:59:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:04,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:04,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:04,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:05,065 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:05,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:05,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:05,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316723676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:05,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:05,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:05,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965130961] [2022-03-15 15:59:05,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:05,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:05,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:05,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:05,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:05,073 INFO L87 Difference]: Start difference. First operand 337 states and 1014 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:05,450 INFO L93 Difference]: Finished difference Result 628 states and 1807 transitions. [2022-03-15 15:59:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:05,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:05,451 INFO L225 Difference]: With dead ends: 628 [2022-03-15 15:59:05,451 INFO L226 Difference]: Without dead ends: 619 [2022-03-15 15:59:05,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:05,452 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 170 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:05,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 171 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-15 15:59:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 343. [2022-03-15 15:59:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0) internal successors, (1026), 342 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1026 transitions. [2022-03-15 15:59:05,456 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1026 transitions. Word has length 22 [2022-03-15 15:59:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:05,456 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1026 transitions. [2022-03-15 15:59:05,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1026 transitions. [2022-03-15 15:59:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:05,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:05,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:05,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 15:59:05,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:05,657 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash 712877859, now seen corresponding path program 131 times [2022-03-15 15:59:05,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:05,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355101359] [2022-03-15 15:59:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:05,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:05,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:05,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355101359] [2022-03-15 15:59:05,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355101359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:05,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787999012] [2022-03-15 15:59:05,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:05,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:05,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:05,741 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:05,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 15:59:05,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:05,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:06,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 15:59:06,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 15:59:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:06,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:06,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:06,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:06,348 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:06,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:06,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:06,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787999012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:06,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:06,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:59:06,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958441647] [2022-03-15 15:59:06,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:06,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:06,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:06,355 INFO L87 Difference]: Start difference. First operand 343 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:06,791 INFO L93 Difference]: Finished difference Result 667 states and 1877 transitions. [2022-03-15 15:59:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:59:06,791 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:06,792 INFO L225 Difference]: With dead ends: 667 [2022-03-15 15:59:06,792 INFO L226 Difference]: Without dead ends: 657 [2022-03-15 15:59:06,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:06,793 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 199 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:06,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 212 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-15 15:59:06,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 355. [2022-03-15 15:59:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.005649717514124) internal successors, (1064), 354 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1064 transitions. [2022-03-15 15:59:06,797 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1064 transitions. Word has length 22 [2022-03-15 15:59:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:06,797 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1064 transitions. [2022-03-15 15:59:06,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1064 transitions. [2022-03-15 15:59:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:06,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:06,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:06,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 15:59:06,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-15 15:59:06,998 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash -867894057, now seen corresponding path program 132 times [2022-03-15 15:59:06,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:06,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16188989] [2022-03-15 15:59:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:07,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16188989] [2022-03-15 15:59:07,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16188989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:07,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870092437] [2022-03-15 15:59:07,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:07,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:07,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:07,087 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:07,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 15:59:07,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:59:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:07,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:07,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:07,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:07,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 15:59:07,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 15:59:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:07,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:07,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:07,684 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:07,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:07,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870092437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:07,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:07,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:59:07,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903919864] [2022-03-15 15:59:07,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:07,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:07,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:07,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:07,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:07,691 INFO L87 Difference]: Start difference. First operand 355 states and 1064 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:08,045 INFO L93 Difference]: Finished difference Result 581 states and 1669 transitions. [2022-03-15 15:59:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:08,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:08,046 INFO L225 Difference]: With dead ends: 581 [2022-03-15 15:59:08,046 INFO L226 Difference]: Without dead ends: 569 [2022-03-15 15:59:08,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:08,046 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:08,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 194 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-15 15:59:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 351. [2022-03-15 15:59:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.005714285714286) internal successors, (1052), 350 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1052 transitions. [2022-03-15 15:59:08,051 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1052 transitions. Word has length 22 [2022-03-15 15:59:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:08,051 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1052 transitions. [2022-03-15 15:59:08,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1052 transitions. [2022-03-15 15:59:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:08,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:08,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:08,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-15 15:59:08,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:08,252 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1148998577, now seen corresponding path program 133 times [2022-03-15 15:59:08,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:08,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680151084] [2022-03-15 15:59:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:08,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:08,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680151084] [2022-03-15 15:59:08,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680151084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:08,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201717632] [2022-03-15 15:59:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:08,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:08,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:08,349 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:08,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 15:59:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:08,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:08,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:08,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:08,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-03-15 15:59:08,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-15 15:59:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:08,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:08,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:09,042 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:09,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:09,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201717632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:09,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:09,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:09,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690224469] [2022-03-15 15:59:09,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:09,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:09,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:09,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:09,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:09,049 INFO L87 Difference]: Start difference. First operand 351 states and 1052 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:09,452 INFO L93 Difference]: Finished difference Result 559 states and 1621 transitions. [2022-03-15 15:59:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:09,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:09,454 INFO L225 Difference]: With dead ends: 559 [2022-03-15 15:59:09,454 INFO L226 Difference]: Without dead ends: 559 [2022-03-15 15:59:09,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:09,454 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 186 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:09,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 205 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-03-15 15:59:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 356. [2022-03-15 15:59:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.0) internal successors, (1065), 355 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1065 transitions. [2022-03-15 15:59:09,458 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1065 transitions. Word has length 22 [2022-03-15 15:59:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:09,458 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1065 transitions. [2022-03-15 15:59:09,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1065 transitions. [2022-03-15 15:59:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:09,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:09,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:09,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-15 15:59:09,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:09,659 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash 345604387, now seen corresponding path program 134 times [2022-03-15 15:59:09,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:09,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072854043] [2022-03-15 15:59:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:09,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:09,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072854043] [2022-03-15 15:59:09,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072854043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:09,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076507378] [2022-03-15 15:59:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:09,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:09,750 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:09,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 15:59:09,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:09,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:09,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:10,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-03-15 15:59:10,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-15 15:59:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:10,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:10,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:10,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:10,433 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:10,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:10,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:10,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076507378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:10,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:10,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:10,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843111820] [2022-03-15 15:59:10,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:10,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:10,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:10,440 INFO L87 Difference]: Start difference. First operand 356 states and 1065 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:10,802 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2022-03-15 15:59:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:10,803 INFO L225 Difference]: With dead ends: 531 [2022-03-15 15:59:10,804 INFO L226 Difference]: Without dead ends: 521 [2022-03-15 15:59:10,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:10,804 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:10,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 215 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-15 15:59:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 335. [2022-03-15 15:59:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.970059880239521) internal successors, (992), 334 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 992 transitions. [2022-03-15 15:59:10,808 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 992 transitions. Word has length 22 [2022-03-15 15:59:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:10,808 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 992 transitions. [2022-03-15 15:59:10,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 992 transitions. [2022-03-15 15:59:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:10,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:10,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:10,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:11,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:11,010 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash -180315899, now seen corresponding path program 135 times [2022-03-15 15:59:11,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:11,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089496022] [2022-03-15 15:59:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:11,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089496022] [2022-03-15 15:59:11,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089496022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:11,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220525898] [2022-03-15 15:59:11,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:11,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:11,107 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:11,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 15:59:11,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:59:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:11,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:11,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:11,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:11,765 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:11,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:11,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220525898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:11,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:11,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:11,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587594960] [2022-03-15 15:59:11,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:11,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:11,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:11,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:11,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:11,773 INFO L87 Difference]: Start difference. First operand 335 states and 992 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:12,165 INFO L93 Difference]: Finished difference Result 464 states and 1374 transitions. [2022-03-15 15:59:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:12,167 INFO L225 Difference]: With dead ends: 464 [2022-03-15 15:59:12,167 INFO L226 Difference]: Without dead ends: 464 [2022-03-15 15:59:12,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:12,167 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:12,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 226 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-15 15:59:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 332. [2022-03-15 15:59:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9697885196374623) internal successors, (983), 331 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 983 transitions. [2022-03-15 15:59:12,171 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 983 transitions. Word has length 22 [2022-03-15 15:59:12,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:12,171 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 983 transitions. [2022-03-15 15:59:12,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 983 transitions. [2022-03-15 15:59:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:12,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:12,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:12,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:12,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:12,372 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 325901489, now seen corresponding path program 136 times [2022-03-15 15:59:12,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:12,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253507391] [2022-03-15 15:59:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:12,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:12,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253507391] [2022-03-15 15:59:12,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253507391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:12,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441693767] [2022-03-15 15:59:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:12,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:12,469 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:12,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 15:59:12,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:12,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:12,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:59:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:12,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:13,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:13,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:13,107 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:13,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:13,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:13,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441693767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:13,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:13,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:13,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142385686] [2022-03-15 15:59:13,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:13,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:13,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:13,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:13,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:13,114 INFO L87 Difference]: Start difference. First operand 332 states and 983 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:13,571 INFO L93 Difference]: Finished difference Result 513 states and 1468 transitions. [2022-03-15 15:59:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:13,572 INFO L225 Difference]: With dead ends: 513 [2022-03-15 15:59:13,572 INFO L226 Difference]: Without dead ends: 513 [2022-03-15 15:59:13,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:13,573 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:13,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 217 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-15 15:59:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 340. [2022-03-15 15:59:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.982300884955752) internal successors, (1011), 339 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1011 transitions. [2022-03-15 15:59:13,577 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1011 transitions. Word has length 22 [2022-03-15 15:59:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:13,577 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1011 transitions. [2022-03-15 15:59:13,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1011 transitions. [2022-03-15 15:59:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:13,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:13,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:13,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-15 15:59:13,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-03-15 15:59:13,779 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1750927815, now seen corresponding path program 137 times [2022-03-15 15:59:13,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:13,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654277967] [2022-03-15 15:59:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:13,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:13,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654277967] [2022-03-15 15:59:13,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654277967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:13,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95923963] [2022-03-15 15:59:13,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:13,875 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:13,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 15:59:14,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:14,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:14,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:14,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:14,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-03-15 15:59:14,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 15:59:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:14,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:14,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:14,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 15:59:14,530 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:14,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:14,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:14,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95923963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:14,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:14,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:14,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330928743] [2022-03-15 15:59:14,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:14,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:14,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:14,537 INFO L87 Difference]: Start difference. First operand 340 states and 1011 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:14,922 INFO L93 Difference]: Finished difference Result 487 states and 1400 transitions. [2022-03-15 15:59:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:14,923 INFO L225 Difference]: With dead ends: 487 [2022-03-15 15:59:14,923 INFO L226 Difference]: Without dead ends: 478 [2022-03-15 15:59:14,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:14,923 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:14,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-15 15:59:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 340. [2022-03-15 15:59:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9528023598820057) internal successors, (1001), 339 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1001 transitions. [2022-03-15 15:59:14,927 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1001 transitions. Word has length 22 [2022-03-15 15:59:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:14,927 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1001 transitions. [2022-03-15 15:59:14,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1001 transitions. [2022-03-15 15:59:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:14,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:14,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:14,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-15 15:59:15,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-15 15:59:15,128 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1786527141, now seen corresponding path program 138 times [2022-03-15 15:59:15,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:15,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61525748] [2022-03-15 15:59:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:15,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61525748] [2022-03-15 15:59:15,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61525748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:15,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579934886] [2022-03-15 15:59:15,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:15,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:15,226 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:15,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 15:59:15,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:15,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:15,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 15:59:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:15,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:15,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:15,866 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:15,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:15,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579934886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:15,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:15,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:15,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443629733] [2022-03-15 15:59:15,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:15,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:15,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:15,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:15,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:15,873 INFO L87 Difference]: Start difference. First operand 340 states and 1001 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:16,240 INFO L93 Difference]: Finished difference Result 423 states and 1248 transitions. [2022-03-15 15:59:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:16,241 INFO L225 Difference]: With dead ends: 423 [2022-03-15 15:59:16,241 INFO L226 Difference]: Without dead ends: 423 [2022-03-15 15:59:16,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:16,241 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 96 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:16,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 198 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-15 15:59:16,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 309. [2022-03-15 15:59:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-03-15 15:59:16,245 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-03-15 15:59:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:16,245 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-03-15 15:59:16,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-03-15 15:59:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:16,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:16,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:16,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-15 15:59:16,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-15 15:59:16,446 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1957780507, now seen corresponding path program 139 times [2022-03-15 15:59:16,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:16,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318821510] [2022-03-15 15:59:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:16,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:16,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:16,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318821510] [2022-03-15 15:59:16,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318821510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:16,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755684299] [2022-03-15 15:59:16,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:16,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:16,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:16,526 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:16,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 15:59:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:16,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:16,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:16,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:59:16,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:59:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:17,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:17,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:17,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:17,294 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:17,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:17,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:17,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755684299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:17,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:17,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:17,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604438820] [2022-03-15 15:59:17,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:17,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:17,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:17,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:17,302 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:17,746 INFO L93 Difference]: Finished difference Result 735 states and 2141 transitions. [2022-03-15 15:59:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:17,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:17,747 INFO L225 Difference]: With dead ends: 735 [2022-03-15 15:59:17,747 INFO L226 Difference]: Without dead ends: 735 [2022-03-15 15:59:17,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:17,748 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 219 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:17,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 214 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-03-15 15:59:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 329. [2022-03-15 15:59:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2022-03-15 15:59:17,752 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2022-03-15 15:59:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:17,752 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2022-03-15 15:59:17,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2022-03-15 15:59:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:17,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:17,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:17,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 15:59:17,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-15 15:59:17,953 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:17,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash -463177543, now seen corresponding path program 140 times [2022-03-15 15:59:17,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:17,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590743981] [2022-03-15 15:59:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:18,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590743981] [2022-03-15 15:59:18,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590743981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:18,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773282464] [2022-03-15 15:59:18,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:18,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:18,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:18,037 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:18,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 15:59:18,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:18,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:18,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:18,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 15:59:18,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 15:59:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:18,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:18,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:18,771 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:18,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:18,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773282464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:18,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:18,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:18,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6636336] [2022-03-15 15:59:18,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:18,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:18,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:18,779 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:19,383 INFO L93 Difference]: Finished difference Result 758 states and 2196 transitions. [2022-03-15 15:59:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:59:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:19,385 INFO L225 Difference]: With dead ends: 758 [2022-03-15 15:59:19,385 INFO L226 Difference]: Without dead ends: 748 [2022-03-15 15:59:19,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:59:19,385 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 273 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:19,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 191 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-15 15:59:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 326. [2022-03-15 15:59:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0) internal successors, (975), 325 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 975 transitions. [2022-03-15 15:59:19,391 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 975 transitions. Word has length 22 [2022-03-15 15:59:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:19,391 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 975 transitions. [2022-03-15 15:59:19,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 975 transitions. [2022-03-15 15:59:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:19,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:19,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:19,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:19,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-15 15:59:19,607 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:19,607 INFO L85 PathProgramCache]: Analyzing trace with hash -38230333, now seen corresponding path program 141 times [2022-03-15 15:59:19,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:19,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268453589] [2022-03-15 15:59:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:19,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:19,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:19,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268453589] [2022-03-15 15:59:19,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268453589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:19,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074623912] [2022-03-15 15:59:19,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:19,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:19,689 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:19,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 15:59:19,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:59:19,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:19,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:19,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:20,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:20,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:20,502 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:20,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:20,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074623912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:20,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:20,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:20,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204392155] [2022-03-15 15:59:20,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:20,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:20,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:20,509 INFO L87 Difference]: Start difference. First operand 326 states and 975 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:20,991 INFO L93 Difference]: Finished difference Result 732 states and 2133 transitions. [2022-03-15 15:59:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:20,993 INFO L225 Difference]: With dead ends: 732 [2022-03-15 15:59:20,993 INFO L226 Difference]: Without dead ends: 712 [2022-03-15 15:59:20,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:20,993 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 215 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:20,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 228 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-15 15:59:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 323. [2022-03-15 15:59:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2022-03-15 15:59:20,998 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 22 [2022-03-15 15:59:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:20,998 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2022-03-15 15:59:20,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2022-03-15 15:59:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:20,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:20,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:21,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-15 15:59:21,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-03-15 15:59:21,199 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:21,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1733366227, now seen corresponding path program 142 times [2022-03-15 15:59:21,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:21,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641732903] [2022-03-15 15:59:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:21,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:21,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:21,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641732903] [2022-03-15 15:59:21,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641732903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:21,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49476468] [2022-03-15 15:59:21,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:21,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:21,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:21,274 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:21,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 15:59:21,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:21,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:21,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:21,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:21,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:21,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:21,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:21,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:22,050 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:22,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:22,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49476468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:22,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:22,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:22,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282699836] [2022-03-15 15:59:22,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:22,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:22,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:22,057 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:22,500 INFO L93 Difference]: Finished difference Result 741 states and 2128 transitions. [2022-03-15 15:59:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:22,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:22,501 INFO L225 Difference]: With dead ends: 741 [2022-03-15 15:59:22,501 INFO L226 Difference]: Without dead ends: 705 [2022-03-15 15:59:22,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:22,501 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 141 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:22,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 234 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-03-15 15:59:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 317. [2022-03-15 15:59:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.971518987341772) internal successors, (939), 316 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 939 transitions. [2022-03-15 15:59:22,506 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 939 transitions. Word has length 22 [2022-03-15 15:59:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:22,506 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 939 transitions. [2022-03-15 15:59:22,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 939 transitions. [2022-03-15 15:59:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:22,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:22,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:22,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-15 15:59:22,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:22,707 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:22,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:22,707 INFO L85 PathProgramCache]: Analyzing trace with hash -257969397, now seen corresponding path program 143 times [2022-03-15 15:59:22,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:22,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407845605] [2022-03-15 15:59:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:22,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407845605] [2022-03-15 15:59:22,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407845605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:22,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017092719] [2022-03-15 15:59:22,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:22,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:22,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:22,801 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:22,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 15:59:23,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:23,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:23,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:23,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:59:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:23,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:23,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:23,605 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:23,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:23,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017092719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:23,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:23,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:23,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925949529] [2022-03-15 15:59:23,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:23,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:23,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:23,612 INFO L87 Difference]: Start difference. First operand 317 states and 939 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:24,059 INFO L93 Difference]: Finished difference Result 644 states and 1879 transitions. [2022-03-15 15:59:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:24,060 INFO L225 Difference]: With dead ends: 644 [2022-03-15 15:59:24,060 INFO L226 Difference]: Without dead ends: 644 [2022-03-15 15:59:24,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:24,061 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 212 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:24,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 192 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-15 15:59:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 325. [2022-03-15 15:59:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0) internal successors, (972), 324 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 972 transitions. [2022-03-15 15:59:24,065 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 972 transitions. Word has length 22 [2022-03-15 15:59:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:24,065 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 972 transitions. [2022-03-15 15:59:24,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 972 transitions. [2022-03-15 15:59:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:24,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:24,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:24,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-15 15:59:24,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-15 15:59:24,266 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1236633567, now seen corresponding path program 144 times [2022-03-15 15:59:24,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:24,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689032490] [2022-03-15 15:59:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:24,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:24,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:24,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689032490] [2022-03-15 15:59:24,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689032490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:24,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392654782] [2022-03-15 15:59:24,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:24,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:24,347 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:24,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 15:59:24,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:59:24,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:24,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:24,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:24,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:59:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:24,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:24,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:24,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:25,061 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:25,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:25,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:25,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392654782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:25,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:25,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:25,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961001376] [2022-03-15 15:59:25,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:25,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:25,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:25,068 INFO L87 Difference]: Start difference. First operand 325 states and 972 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:25,844 INFO L93 Difference]: Finished difference Result 728 states and 2117 transitions. [2022-03-15 15:59:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:59:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:25,845 INFO L225 Difference]: With dead ends: 728 [2022-03-15 15:59:25,845 INFO L226 Difference]: Without dead ends: 718 [2022-03-15 15:59:25,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:59:25,846 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 207 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:25,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 231 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-15 15:59:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 322. [2022-03-15 15:59:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9906542056074765) internal successors, (960), 321 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 960 transitions. [2022-03-15 15:59:25,850 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 960 transitions. Word has length 22 [2022-03-15 15:59:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:25,850 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 960 transitions. [2022-03-15 15:59:25,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 960 transitions. [2022-03-15 15:59:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:25,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:25,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:25,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:26,051 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1661580777, now seen corresponding path program 145 times [2022-03-15 15:59:26,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:26,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597375055] [2022-03-15 15:59:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:26,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597375055] [2022-03-15 15:59:26,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597375055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:26,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056986578] [2022-03-15 15:59:26,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:26,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:26,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:26,146 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:26,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 15:59:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:26,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:26,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:26,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:26,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:26,853 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:26,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:26,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056986578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:26,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:26,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:26,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807772057] [2022-03-15 15:59:26,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:26,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:26,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:26,861 INFO L87 Difference]: Start difference. First operand 322 states and 960 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:27,440 INFO L93 Difference]: Finished difference Result 652 states and 1904 transitions. [2022-03-15 15:59:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:59:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:27,441 INFO L225 Difference]: With dead ends: 652 [2022-03-15 15:59:27,441 INFO L226 Difference]: Without dead ends: 632 [2022-03-15 15:59:27,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:59:27,442 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:27,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 173 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-15 15:59:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 319. [2022-03-15 15:59:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.981132075471698) internal successors, (948), 318 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 948 transitions. [2022-03-15 15:59:27,446 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 948 transitions. Word has length 22 [2022-03-15 15:59:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:27,446 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 948 transitions. [2022-03-15 15:59:27,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 948 transitions. [2022-03-15 15:59:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:27,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:27,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:27,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:27,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:27,647 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:27,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1038642111, now seen corresponding path program 146 times [2022-03-15 15:59:27,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:27,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893153869] [2022-03-15 15:59:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:27,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893153869] [2022-03-15 15:59:27,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893153869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:27,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073509733] [2022-03-15 15:59:27,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:27,733 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:27,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 15:59:27,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:27,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:28,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:59:28,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:59:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:28,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:28,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:28,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:28,480 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:28,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:28,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:28,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073509733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:28,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:28,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:28,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615665635] [2022-03-15 15:59:28,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:28,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:28,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:28,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:28,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:28,488 INFO L87 Difference]: Start difference. First operand 319 states and 948 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:29,115 INFO L93 Difference]: Finished difference Result 762 states and 2215 transitions. [2022-03-15 15:59:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:29,117 INFO L225 Difference]: With dead ends: 762 [2022-03-15 15:59:29,117 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 15:59:29,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:29,117 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 260 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:29,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 250 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 15:59:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 329. [2022-03-15 15:59:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.033536585365854) internal successors, (995), 328 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 995 transitions. [2022-03-15 15:59:29,122 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 995 transitions. Word has length 22 [2022-03-15 15:59:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:29,122 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 995 transitions. [2022-03-15 15:59:29,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 995 transitions. [2022-03-15 15:59:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:29,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:29,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:29,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-15 15:59:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:29,327 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1761722221, now seen corresponding path program 147 times [2022-03-15 15:59:29,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:29,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404043961] [2022-03-15 15:59:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:29,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:29,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404043961] [2022-03-15 15:59:29,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404043961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:29,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726130243] [2022-03-15 15:59:29,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:29,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:29,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:29,409 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:29,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 15:59:29,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:59:29,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:29,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:29,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:59:29,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:59:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:30,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:30,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:30,165 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:30,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:30,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:30,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726130243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:30,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:30,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:30,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860743152] [2022-03-15 15:59:30,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:30,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:30,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:30,173 INFO L87 Difference]: Start difference. First operand 329 states and 995 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:31,150 INFO L93 Difference]: Finished difference Result 845 states and 2440 transitions. [2022-03-15 15:59:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:59:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:31,152 INFO L225 Difference]: With dead ends: 845 [2022-03-15 15:59:31,152 INFO L226 Difference]: Without dead ends: 835 [2022-03-15 15:59:31,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 15:59:31,152 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 278 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:31,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 245 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-15 15:59:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 336. [2022-03-15 15:59:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.011940298507463) internal successors, (1009), 335 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1009 transitions. [2022-03-15 15:59:31,157 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1009 transitions. Word has length 22 [2022-03-15 15:59:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:31,157 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1009 transitions. [2022-03-15 15:59:31,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1009 transitions. [2022-03-15 15:59:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:31,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:31,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:31,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-15 15:59:31,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:31,358 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash -720647029, now seen corresponding path program 148 times [2022-03-15 15:59:31,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:31,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621939538] [2022-03-15 15:59:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:31,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621939538] [2022-03-15 15:59:31,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621939538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:31,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243082543] [2022-03-15 15:59:31,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:31,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:31,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:31,443 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:31,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 15:59:31,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:31,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:31,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:59:31,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:59:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:32,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:32,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:32,194 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:32,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:32,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:32,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243082543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:32,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:32,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:32,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021757790] [2022-03-15 15:59:32,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:32,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:32,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:32,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:32,202 INFO L87 Difference]: Start difference. First operand 336 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:32,738 INFO L93 Difference]: Finished difference Result 770 states and 2210 transitions. [2022-03-15 15:59:32,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:32,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:32,739 INFO L225 Difference]: With dead ends: 770 [2022-03-15 15:59:32,739 INFO L226 Difference]: Without dead ends: 770 [2022-03-15 15:59:32,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:32,739 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 257 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:32,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 226 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-15 15:59:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 327. [2022-03-15 15:59:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.01840490797546) internal successors, (984), 326 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 984 transitions. [2022-03-15 15:59:32,744 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 984 transitions. Word has length 22 [2022-03-15 15:59:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:32,744 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 984 transitions. [2022-03-15 15:59:32,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 984 transitions. [2022-03-15 15:59:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:32,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:32,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:32,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:32,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-15 15:59:32,957 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:32,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1497490963, now seen corresponding path program 149 times [2022-03-15 15:59:32,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:32,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214920456] [2022-03-15 15:59:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:33,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214920456] [2022-03-15 15:59:33,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214920456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:33,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557812182] [2022-03-15 15:59:33,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:33,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:33,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:33,046 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:33,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 15:59:33,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:59:33,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:33,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:33,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:33,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:59:33,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:59:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:33,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:33,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:33,763 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:33,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:33,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557812182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:33,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:33,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:33,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987650951] [2022-03-15 15:59:33,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:33,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:33,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:33,771 INFO L87 Difference]: Start difference. First operand 327 states and 984 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:34,265 INFO L93 Difference]: Finished difference Result 686 states and 1976 transitions. [2022-03-15 15:59:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:34,266 INFO L225 Difference]: With dead ends: 686 [2022-03-15 15:59:34,266 INFO L226 Difference]: Without dead ends: 677 [2022-03-15 15:59:34,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:34,267 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 207 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:34,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 215 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-15 15:59:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 333. [2022-03-15 15:59:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2022-03-15 15:59:34,271 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 22 [2022-03-15 15:59:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:34,271 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2022-03-15 15:59:34,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2022-03-15 15:59:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:34,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:34,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:34,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-15 15:59:34,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-15 15:59:34,472 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1839740457, now seen corresponding path program 150 times [2022-03-15 15:59:34,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:34,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472490324] [2022-03-15 15:59:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:34,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:34,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472490324] [2022-03-15 15:59:34,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472490324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:34,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074799026] [2022-03-15 15:59:34,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:34,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:34,573 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:34,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 15:59:34,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:34,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:34,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 15:59:34,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 15:59:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:35,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:35,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:35,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:35,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:35,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:35,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:35,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074799026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:35,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:35,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:59:35,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957508119] [2022-03-15 15:59:35,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:35,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:35,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:35,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:35,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:35,267 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:36,220 INFO L93 Difference]: Finished difference Result 814 states and 2298 transitions. [2022-03-15 15:59:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:59:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:36,221 INFO L225 Difference]: With dead ends: 814 [2022-03-15 15:59:36,221 INFO L226 Difference]: Without dead ends: 804 [2022-03-15 15:59:36,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=416, Invalid=1306, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:59:36,221 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:36,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 260 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-15 15:59:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 355. [2022-03-15 15:59:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.994350282485876) internal successors, (1060), 354 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1060 transitions. [2022-03-15 15:59:36,230 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1060 transitions. Word has length 22 [2022-03-15 15:59:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:36,230 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1060 transitions. [2022-03-15 15:59:36,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1060 transitions. [2022-03-15 15:59:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:36,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:36,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:36,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:36,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-15 15:59:36,451 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 258968541, now seen corresponding path program 151 times [2022-03-15 15:59:36,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:36,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064504756] [2022-03-15 15:59:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:36,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064504756] [2022-03-15 15:59:36,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064504756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:36,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602150785] [2022-03-15 15:59:36,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:36,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:36,530 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:36,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 15:59:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:36,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:36,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:36,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 15:59:36,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 15:59:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:37,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:37,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:37,224 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:37,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:37,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:37,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602150785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:37,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:37,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:59:37,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715506711] [2022-03-15 15:59:37,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:37,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:37,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:37,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:37,231 INFO L87 Difference]: Start difference. First operand 355 states and 1060 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:38,021 INFO L93 Difference]: Finished difference Result 771 states and 2187 transitions. [2022-03-15 15:59:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:59:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:38,022 INFO L225 Difference]: With dead ends: 771 [2022-03-15 15:59:38,022 INFO L226 Difference]: Without dead ends: 759 [2022-03-15 15:59:38,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:59:38,022 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 204 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:38,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 238 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-15 15:59:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 335. [2022-03-15 15:59:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9940119760479043) internal successors, (1000), 334 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1000 transitions. [2022-03-15 15:59:38,027 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1000 transitions. Word has length 22 [2022-03-15 15:59:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:38,027 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1000 transitions. [2022-03-15 15:59:38,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1000 transitions. [2022-03-15 15:59:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:38,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:38,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:38,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-15 15:59:38,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-15 15:59:38,228 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1637774099, now seen corresponding path program 152 times [2022-03-15 15:59:38,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:38,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972916547] [2022-03-15 15:59:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:38,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:38,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:38,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972916547] [2022-03-15 15:59:38,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972916547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:38,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544677906] [2022-03-15 15:59:38,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:38,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:38,300 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:38,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 15:59:38,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:38,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:38,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:38,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:38,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:38,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:38,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:38,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:39,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544677906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:39,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:39,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:39,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683391970] [2022-03-15 15:59:39,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:39,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:39,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:39,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:39,005 INFO L87 Difference]: Start difference. First operand 335 states and 1000 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:39,496 INFO L93 Difference]: Finished difference Result 634 states and 1850 transitions. [2022-03-15 15:59:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:39,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:39,498 INFO L225 Difference]: With dead ends: 634 [2022-03-15 15:59:39,498 INFO L226 Difference]: Without dead ends: 614 [2022-03-15 15:59:39,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:39,498 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:39,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 177 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-15 15:59:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 341. [2022-03-15 15:59:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9794117647058824) internal successors, (1013), 340 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1013 transitions. [2022-03-15 15:59:39,502 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1013 transitions. Word has length 22 [2022-03-15 15:59:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:39,502 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1013 transitions. [2022-03-15 15:59:39,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1013 transitions. [2022-03-15 15:59:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:39,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:39,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:39,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-15 15:59:39,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:39,703 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash -121515041, now seen corresponding path program 153 times [2022-03-15 15:59:39,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:39,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849547361] [2022-03-15 15:59:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:39,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:39,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849547361] [2022-03-15 15:59:39,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849547361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:39,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713000588] [2022-03-15 15:59:39,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:39,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:39,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:39,780 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:39,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 15:59:39,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:39,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:40,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:40,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 15:59:40,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 15:59:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:40,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:40,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:40,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:40,508 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:40,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:40,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:40,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713000588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:40,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:40,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:59:40,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931245140] [2022-03-15 15:59:40,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:40,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:40,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:40,515 INFO L87 Difference]: Start difference. First operand 341 states and 1013 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:41,139 INFO L93 Difference]: Finished difference Result 712 states and 2028 transitions. [2022-03-15 15:59:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:59:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:41,140 INFO L225 Difference]: With dead ends: 712 [2022-03-15 15:59:41,140 INFO L226 Difference]: Without dead ends: 702 [2022-03-15 15:59:41,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:41,141 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 191 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:41,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 245 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-15 15:59:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 363. [2022-03-15 15:59:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.9751381215469612) internal successors, (1077), 362 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1077 transitions. [2022-03-15 15:59:41,145 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1077 transitions. Word has length 22 [2022-03-15 15:59:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:41,146 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1077 transitions. [2022-03-15 15:59:41,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1077 transitions. [2022-03-15 15:59:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:41,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:41,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:41,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-15 15:59:41,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:41,368 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1702286957, now seen corresponding path program 154 times [2022-03-15 15:59:41,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:41,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992162224] [2022-03-15 15:59:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:41,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:41,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:41,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992162224] [2022-03-15 15:59:41,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992162224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:41,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370868355] [2022-03-15 15:59:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:41,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:41,443 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:41,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 15:59:41,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:41,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:41,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:41,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 15:59:41,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 15:59:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:41,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:42,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:42,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:42,155 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:42,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:42,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:42,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370868355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:42,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:42,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:59:42,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234026563] [2022-03-15 15:59:42,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:42,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:42,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:42,163 INFO L87 Difference]: Start difference. First operand 363 states and 1077 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:42,640 INFO L93 Difference]: Finished difference Result 669 states and 1917 transitions. [2022-03-15 15:59:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:42,641 INFO L225 Difference]: With dead ends: 669 [2022-03-15 15:59:42,641 INFO L226 Difference]: Without dead ends: 654 [2022-03-15 15:59:42,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:42,641 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:42,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 164 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-03-15 15:59:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 337. [2022-03-15 15:59:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.988095238095238) internal successors, (1004), 336 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1004 transitions. [2022-03-15 15:59:42,645 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1004 transitions. Word has length 22 [2022-03-15 15:59:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:42,645 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1004 transitions. [2022-03-15 15:59:42,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1004 transitions. [2022-03-15 15:59:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:42,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:42,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:42,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-15 15:59:42,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:42,846 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash 995359209, now seen corresponding path program 155 times [2022-03-15 15:59:42,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:42,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161255531] [2022-03-15 15:59:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:42,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:42,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161255531] [2022-03-15 15:59:42,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161255531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:42,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397523525] [2022-03-15 15:59:42,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:42,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:42,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:42,911 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:42,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 15:59:43,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:43,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:43,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:43,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:43,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:43,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:43,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:43,554 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:43,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:43,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:43,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397523525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:43,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:43,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:43,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783665452] [2022-03-15 15:59:43,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:43,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:43,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:43,561 INFO L87 Difference]: Start difference. First operand 337 states and 1004 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:44,031 INFO L93 Difference]: Finished difference Result 650 states and 1872 transitions. [2022-03-15 15:59:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:44,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:44,033 INFO L225 Difference]: With dead ends: 650 [2022-03-15 15:59:44,033 INFO L226 Difference]: Without dead ends: 614 [2022-03-15 15:59:44,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:44,033 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:44,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 209 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-15 15:59:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 347. [2022-03-15 15:59:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.96242774566474) internal successors, (1025), 346 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1025 transitions. [2022-03-15 15:59:44,039 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1025 transitions. Word has length 22 [2022-03-15 15:59:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:44,039 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1025 transitions. [2022-03-15 15:59:44,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1025 transitions. [2022-03-15 15:59:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:44,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:44,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:44,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-15 15:59:44,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:44,253 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1582207485, now seen corresponding path program 156 times [2022-03-15 15:59:44,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:44,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960695355] [2022-03-15 15:59:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:44,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:44,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:44,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960695355] [2022-03-15 15:59:44,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960695355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:44,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717925248] [2022-03-15 15:59:44,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:44,331 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:44,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 15:59:44,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:44,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:44,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:44,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:44,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:44,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 15:59:44,975 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:44,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:44,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:44,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717925248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:44,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:44,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:44,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978342594] [2022-03-15 15:59:44,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:44,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:44,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:44,982 INFO L87 Difference]: Start difference. First operand 347 states and 1025 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:45,481 INFO L93 Difference]: Finished difference Result 594 states and 1722 transitions. [2022-03-15 15:59:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:45,482 INFO L225 Difference]: With dead ends: 594 [2022-03-15 15:59:45,482 INFO L226 Difference]: Without dead ends: 574 [2022-03-15 15:59:45,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:45,483 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:45,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 235 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-03-15 15:59:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 353. [2022-03-15 15:59:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.9488636363636362) internal successors, (1038), 352 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1038 transitions. [2022-03-15 15:59:45,489 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1038 transitions. Word has length 22 [2022-03-15 15:59:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:45,489 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1038 transitions. [2022-03-15 15:59:45,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:45,489 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1038 transitions. [2022-03-15 15:59:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:45,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:45,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:45,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-15 15:59:45,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2022-03-15 15:59:45,695 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:45,696 INFO L85 PathProgramCache]: Analyzing trace with hash 953470671, now seen corresponding path program 157 times [2022-03-15 15:59:45,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:45,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792730724] [2022-03-15 15:59:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:45,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:45,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:45,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792730724] [2022-03-15 15:59:45,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792730724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:45,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610366171] [2022-03-15 15:59:45,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:45,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:45,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:45,764 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:45,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 15:59:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:45,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:46,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 15:59:46,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 15:59:46,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 15:59:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:46,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:46,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:46,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:46,412 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:46,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:46,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:46,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610366171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:46,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:46,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:59:46,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212427168] [2022-03-15 15:59:46,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:46,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:59:46,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:46,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:59:46,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:59:46,419 INFO L87 Difference]: Start difference. First operand 353 states and 1038 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:46,956 INFO L93 Difference]: Finished difference Result 639 states and 1811 transitions. [2022-03-15 15:59:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:59:46,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:46,957 INFO L225 Difference]: With dead ends: 639 [2022-03-15 15:59:46,957 INFO L226 Difference]: Without dead ends: 609 [2022-03-15 15:59:46,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:46,958 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:46,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 248 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-03-15 15:59:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 340. [2022-03-15 15:59:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.976401179941003) internal successors, (1009), 339 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1009 transitions. [2022-03-15 15:59:46,962 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1009 transitions. Word has length 22 [2022-03-15 15:59:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:46,962 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1009 transitions. [2022-03-15 15:59:46,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1009 transitions. [2022-03-15 15:59:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:46,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:46,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:46,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-15 15:59:47,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:47,163 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 836691451, now seen corresponding path program 158 times [2022-03-15 15:59:47,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:47,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980993357] [2022-03-15 15:59:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:47,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:47,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980993357] [2022-03-15 15:59:47,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980993357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:47,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888543325] [2022-03-15 15:59:47,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:47,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:47,243 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:47,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 15:59:47,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:47,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:47,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:47,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:59:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:47,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:47,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:47,891 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:47,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:47,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888543325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:47,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:47,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:47,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396421869] [2022-03-15 15:59:47,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:47,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:47,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:47,899 INFO L87 Difference]: Start difference. First operand 340 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:48,271 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2022-03-15 15:59:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:48,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:48,272 INFO L225 Difference]: With dead ends: 613 [2022-03-15 15:59:48,272 INFO L226 Difference]: Without dead ends: 613 [2022-03-15 15:59:48,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:48,272 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 163 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:48,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 196 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-15 15:59:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 349. [2022-03-15 15:59:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2022-03-15 15:59:48,276 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2022-03-15 15:59:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:48,276 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2022-03-15 15:59:48,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2022-03-15 15:59:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:48,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:48,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:48,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:48,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:48,477 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:48,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1963672881, now seen corresponding path program 159 times [2022-03-15 15:59:48,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:48,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166710346] [2022-03-15 15:59:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:48,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:48,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:48,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166710346] [2022-03-15 15:59:48,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166710346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:48,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217923740] [2022-03-15 15:59:48,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:48,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:48,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:48,553 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:48,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 15:59:48,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:59:48,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:48,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:48,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:59:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:49,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:49,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:49,180 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:49,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:49,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:49,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217923740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:49,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:49,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:49,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402958618] [2022-03-15 15:59:49,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:49,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:49,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:49,188 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:49,728 INFO L93 Difference]: Finished difference Result 636 states and 1819 transitions. [2022-03-15 15:59:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:59:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:49,729 INFO L225 Difference]: With dead ends: 636 [2022-03-15 15:59:49,729 INFO L226 Difference]: Without dead ends: 626 [2022-03-15 15:59:49,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:59:49,730 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 199 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:49,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 180 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-03-15 15:59:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 346. [2022-03-15 15:59:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9565217391304346) internal successors, (1020), 345 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1020 transitions. [2022-03-15 15:59:49,743 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1020 transitions. Word has length 22 [2022-03-15 15:59:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1020 transitions. [2022-03-15 15:59:49,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1020 transitions. [2022-03-15 15:59:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:49,743 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:49,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:49,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-15 15:59:49,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-03-15 15:59:49,944 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:49,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:49,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1538725671, now seen corresponding path program 160 times [2022-03-15 15:59:49,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:49,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055354031] [2022-03-15 15:59:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:49,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:50,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:50,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055354031] [2022-03-15 15:59:50,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055354031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:50,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965803056] [2022-03-15 15:59:50,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:50,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:50,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:50,016 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:50,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-15 15:59:50,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:50,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:50,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:50,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:50,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:50,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:50,605 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:50,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:50,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:50,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965803056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:50,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:50,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:50,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551894343] [2022-03-15 15:59:50,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:50,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:50,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:50,612 INFO L87 Difference]: Start difference. First operand 346 states and 1020 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:51,063 INFO L93 Difference]: Finished difference Result 622 states and 1797 transitions. [2022-03-15 15:59:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:59:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:51,065 INFO L225 Difference]: With dead ends: 622 [2022-03-15 15:59:51,065 INFO L226 Difference]: Without dead ends: 602 [2022-03-15 15:59:51,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:51,065 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 134 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:51,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 239 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-03-15 15:59:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 343. [2022-03-15 15:59:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.9473684210526314) internal successors, (1008), 342 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1008 transitions. [2022-03-15 15:59:51,070 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1008 transitions. Word has length 22 [2022-03-15 15:59:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:51,070 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1008 transitions. [2022-03-15 15:59:51,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1008 transitions. [2022-03-15 15:59:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:51,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:51,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:51,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-15 15:59:51,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-15 15:59:51,271 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 232870889, now seen corresponding path program 161 times [2022-03-15 15:59:51,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:51,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270511483] [2022-03-15 15:59:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:51,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:51,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270511483] [2022-03-15 15:59:51,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270511483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:51,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366528247] [2022-03-15 15:59:51,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:51,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:51,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:51,336 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:51,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-15 15:59:51,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:51,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:51,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:51,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:51,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:51,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:51,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:51,930 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:51,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:51,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:51,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366528247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:51,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:51,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:51,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509364738] [2022-03-15 15:59:51,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:51,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:51,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:51,938 INFO L87 Difference]: Start difference. First operand 343 states and 1008 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:52,344 INFO L93 Difference]: Finished difference Result 550 states and 1589 transitions. [2022-03-15 15:59:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:52,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:52,345 INFO L225 Difference]: With dead ends: 550 [2022-03-15 15:59:52,346 INFO L226 Difference]: Without dead ends: 514 [2022-03-15 15:59:52,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:52,346 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:52,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 252 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-15 15:59:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 317. [2022-03-15 15:59:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9462025316455698) internal successors, (931), 316 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 931 transitions. [2022-03-15 15:59:52,350 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 931 transitions. Word has length 22 [2022-03-15 15:59:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:52,350 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 931 transitions. [2022-03-15 15:59:52,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 931 transitions. [2022-03-15 15:59:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:52,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:52,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:52,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-15 15:59:52,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-15 15:59:52,551 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1000298955, now seen corresponding path program 162 times [2022-03-15 15:59:52,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:52,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580100652] [2022-03-15 15:59:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:52,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:52,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580100652] [2022-03-15 15:59:52,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580100652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:52,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393408958] [2022-03-15 15:59:52,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:52,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:52,630 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:52,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-15 15:59:52,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:52,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:52,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:52,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:59:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:53,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:53,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:53,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:53,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:53,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:53,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:53,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393408958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:53,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:53,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:53,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927580399] [2022-03-15 15:59:53,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:53,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:53,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:53,267 INFO L87 Difference]: Start difference. First operand 317 states and 931 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:53,594 INFO L93 Difference]: Finished difference Result 499 states and 1457 transitions. [2022-03-15 15:59:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:53,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:53,595 INFO L225 Difference]: With dead ends: 499 [2022-03-15 15:59:53,595 INFO L226 Difference]: Without dead ends: 499 [2022-03-15 15:59:53,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:53,595 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 119 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:53,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 205 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-15 15:59:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 326. [2022-03-15 15:59:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9661538461538464) internal successors, (964), 325 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 964 transitions. [2022-03-15 15:59:53,599 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 964 transitions. Word has length 22 [2022-03-15 15:59:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:53,599 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 964 transitions. [2022-03-15 15:59:53,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 964 transitions. [2022-03-15 15:59:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:53,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:53,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:53,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:53,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:53,800 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1800065377, now seen corresponding path program 163 times [2022-03-15 15:59:53,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:53,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35575279] [2022-03-15 15:59:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:53,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:53,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35575279] [2022-03-15 15:59:53,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35575279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:53,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250429784] [2022-03-15 15:59:53,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:53,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:53,877 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:53,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-15 15:59:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:54,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 15:59:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:54,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:54,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:54,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:54,508 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:54,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:54,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:54,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250429784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:54,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:54,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:54,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405975096] [2022-03-15 15:59:54,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:54,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:54,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:54,515 INFO L87 Difference]: Start difference. First operand 326 states and 964 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:54,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:54,896 INFO L93 Difference]: Finished difference Result 530 states and 1536 transitions. [2022-03-15 15:59:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:54,896 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:54,897 INFO L225 Difference]: With dead ends: 530 [2022-03-15 15:59:54,897 INFO L226 Difference]: Without dead ends: 520 [2022-03-15 15:59:54,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:54,897 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:54,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 197 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:59:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-15 15:59:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 323. [2022-03-15 15:59:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9565217391304346) internal successors, (952), 322 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 952 transitions. [2022-03-15 15:59:54,901 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 952 transitions. Word has length 22 [2022-03-15 15:59:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:54,901 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 952 transitions. [2022-03-15 15:59:54,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 952 transitions. [2022-03-15 15:59:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:54,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:54,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:54,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-15 15:59:55,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-03-15 15:59:55,102 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1375118167, now seen corresponding path program 164 times [2022-03-15 15:59:55,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:55,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975223337] [2022-03-15 15:59:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:55,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:55,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:55,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975223337] [2022-03-15 15:59:55,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975223337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:55,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615596383] [2022-03-15 15:59:55,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:55,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:55,173 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:55,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-15 15:59:55,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:55,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:55,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:55,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:55,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:55,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 15:59:55,779 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:55,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:55,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:55,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615596383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:55,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:55,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:55,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569644001] [2022-03-15 15:59:55,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:55,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:55,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:55,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:55,786 INFO L87 Difference]: Start difference. First operand 323 states and 952 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:56,092 INFO L93 Difference]: Finished difference Result 481 states and 1408 transitions. [2022-03-15 15:59:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:59:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:56,093 INFO L225 Difference]: With dead ends: 481 [2022-03-15 15:59:56,093 INFO L226 Difference]: Without dead ends: 461 [2022-03-15 15:59:56,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:56,093 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:56,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 177 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-15 15:59:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 320. [2022-03-15 15:59:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2022-03-15 15:59:56,097 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2022-03-15 15:59:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:56,097 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2022-03-15 15:59:56,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2022-03-15 15:59:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:56,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:56,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:56,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-15 15:59:56,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-03-15 15:59:56,298 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1214196745, now seen corresponding path program 165 times [2022-03-15 15:59:56,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:56,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781525359] [2022-03-15 15:59:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:56,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:56,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:56,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781525359] [2022-03-15 15:59:56,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781525359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:56,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059689378] [2022-03-15 15:59:56,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:56,382 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:56,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-15 15:59:56,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:59:56,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:56,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:59:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:56,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:56,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:56,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:57,003 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:57,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:57,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:57,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059689378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:57,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:57,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:59:57,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191340764] [2022-03-15 15:59:57,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:57,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:57,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:57,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:57,011 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:57,317 INFO L93 Difference]: Finished difference Result 591 states and 1707 transitions. [2022-03-15 15:59:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:59:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:57,318 INFO L225 Difference]: With dead ends: 591 [2022-03-15 15:59:57,318 INFO L226 Difference]: Without dead ends: 591 [2022-03-15 15:59:57,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:57,319 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:57,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 160 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-15 15:59:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 332. [2022-03-15 15:59:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.984894259818731) internal successors, (988), 331 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 988 transitions. [2022-03-15 15:59:57,324 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 988 transitions. Word has length 22 [2022-03-15 15:59:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:57,325 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 988 transitions. [2022-03-15 15:59:57,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 988 transitions. [2022-03-15 15:59:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:57,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:57,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:57,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:57,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-03-15 15:59:57,547 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 280406219, now seen corresponding path program 166 times [2022-03-15 15:59:57,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:57,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106787074] [2022-03-15 15:59:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:57,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:57,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:57,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106787074] [2022-03-15 15:59:57,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106787074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:57,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942236803] [2022-03-15 15:59:57,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:57,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:57,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:57,627 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:57,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-15 15:59:57,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:57,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:57,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:57,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 15:59:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:58,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:58,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:58,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:58,223 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:58,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:58,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:58,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942236803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:58,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:58,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:58,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966461031] [2022-03-15 15:59:58,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:58,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:58,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:58,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:58,230 INFO L87 Difference]: Start difference. First operand 332 states and 988 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:58,487 INFO L93 Difference]: Finished difference Result 534 states and 1552 transitions. [2022-03-15 15:59:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:58,488 INFO L225 Difference]: With dead ends: 534 [2022-03-15 15:59:58,488 INFO L226 Difference]: Without dead ends: 524 [2022-03-15 15:59:58,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:58,489 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:58,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 156 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-15 15:59:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 339. [2022-03-15 15:59:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.964497041420118) internal successors, (1002), 338 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1002 transitions. [2022-03-15 15:59:58,493 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1002 transitions. Word has length 22 [2022-03-15 15:59:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:58,493 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1002 transitions. [2022-03-15 15:59:58,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1002 transitions. [2022-03-15 15:59:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:58,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:58,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:58,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-15 15:59:58,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:58,694 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash -38706101, now seen corresponding path program 167 times [2022-03-15 15:59:58,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:58,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297589122] [2022-03-15 15:59:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:58,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:58,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:58,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297589122] [2022-03-15 15:59:58,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297589122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:58,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691851393] [2022-03-15 15:59:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:58,782 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:58,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-15 15:59:58,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:58,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 15:59:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:59,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:59,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:59,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 15:59:59,398 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:59,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 15:59:59,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 15:59:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:59,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691851393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:59,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:59,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:59:59,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913428857] [2022-03-15 15:59:59,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:59,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:59:59,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:59:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:59:59,405 INFO L87 Difference]: Start difference. First operand 339 states and 1002 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:59,630 INFO L93 Difference]: Finished difference Result 458 states and 1354 transitions. [2022-03-15 15:59:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 15:59:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:59,631 INFO L225 Difference]: With dead ends: 458 [2022-03-15 15:59:59,631 INFO L226 Difference]: Without dead ends: 458 [2022-03-15 15:59:59,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:59,631 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:59,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 127 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-15 15:59:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 311. [2022-03-15 15:59:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.945161290322581) internal successors, (913), 310 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 913 transitions. [2022-03-15 15:59:59,635 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 913 transitions. Word has length 22 [2022-03-15 15:59:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:59,635 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 913 transitions. [2022-03-15 15:59:59,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 913 transitions. [2022-03-15 15:59:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 15:59:59,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:59,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:59,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-15 15:59:59,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:59,836 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 15:59:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1499669411, now seen corresponding path program 168 times [2022-03-15 15:59:59,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:59,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183508935] [2022-03-15 15:59:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:59,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:59,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183508935] [2022-03-15 15:59:59,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183508935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:59,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685184024] [2022-03-15 15:59:59,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:59,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:59,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:59,941 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:59,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-15 16:00:00,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:00:00,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:00,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:00,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:00,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:00:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:00,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:00,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:00,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:00,715 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:00,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:00,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:00,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685184024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:00,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:00,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:00,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225882906] [2022-03-15 16:00:00,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:00,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:00,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:00,722 INFO L87 Difference]: Start difference. First operand 311 states and 913 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:01,082 INFO L93 Difference]: Finished difference Result 493 states and 1438 transitions. [2022-03-15 16:00:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:01,084 INFO L225 Difference]: With dead ends: 493 [2022-03-15 16:00:01,084 INFO L226 Difference]: Without dead ends: 493 [2022-03-15 16:00:01,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:01,084 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 137 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:01,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 187 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-03-15 16:00:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 321. [2022-03-15 16:00:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.978125) internal successors, (953), 320 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 953 transitions. [2022-03-15 16:00:01,088 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 953 transitions. Word has length 22 [2022-03-15 16:00:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:01,088 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 953 transitions. [2022-03-15 16:00:01,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 953 transitions. [2022-03-15 16:00:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:01,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:01,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:01,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-15 16:00:01,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:01,290 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash -5066447, now seen corresponding path program 169 times [2022-03-15 16:00:01,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:01,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114583404] [2022-03-15 16:00:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:01,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:01,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114583404] [2022-03-15 16:00:01,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114583404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:01,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995696279] [2022-03-15 16:00:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:01,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:01,385 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:01,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-15 16:00:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:01,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:01,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:01,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 16:00:01,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:00:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:01,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:02,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:02,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:02,165 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:02,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:02,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:02,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995696279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:02,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:02,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:02,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338662437] [2022-03-15 16:00:02,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:02,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:02,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:02,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:02,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:02,172 INFO L87 Difference]: Start difference. First operand 321 states and 953 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:02,631 INFO L93 Difference]: Finished difference Result 524 states and 1517 transitions. [2022-03-15 16:00:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:02,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:02,632 INFO L225 Difference]: With dead ends: 524 [2022-03-15 16:00:02,632 INFO L226 Difference]: Without dead ends: 514 [2022-03-15 16:00:02,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:00:02,633 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:02,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 230 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-15 16:00:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 318. [2022-03-15 16:00:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2022-03-15 16:00:02,638 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2022-03-15 16:00:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:02,638 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2022-03-15 16:00:02,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2022-03-15 16:00:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:02,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:02,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:02,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-15 16:00:02,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:02,843 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash 419880763, now seen corresponding path program 170 times [2022-03-15 16:00:02,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:02,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15605341] [2022-03-15 16:00:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:02,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:02,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15605341] [2022-03-15 16:00:02,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15605341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:02,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189479678] [2022-03-15 16:00:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:02,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:02,929 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-15 16:00:03,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:03,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:03,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:03,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:03,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:03,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:03,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:03,671 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:03,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:03,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:03,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189479678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:03,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:03,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:03,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782536986] [2022-03-15 16:00:03,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:03,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:03,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:03,679 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:04,040 INFO L93 Difference]: Finished difference Result 485 states and 1415 transitions. [2022-03-15 16:00:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:04,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:04,041 INFO L225 Difference]: With dead ends: 485 [2022-03-15 16:00:04,041 INFO L226 Difference]: Without dead ends: 465 [2022-03-15 16:00:04,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:04,041 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:04,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 172 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:04,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-15 16:00:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 315. [2022-03-15 16:00:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9585987261146496) internal successors, (929), 314 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 929 transitions. [2022-03-15 16:00:04,045 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 929 transitions. Word has length 22 [2022-03-15 16:00:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:04,045 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 929 transitions. [2022-03-15 16:00:04,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 929 transitions. [2022-03-15 16:00:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:04,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:04,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:04,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:04,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-15 16:00:04,246 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash -203057903, now seen corresponding path program 171 times [2022-03-15 16:00:04,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:04,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731347234] [2022-03-15 16:00:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:04,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:04,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:04,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731347234] [2022-03-15 16:00:04,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731347234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:04,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063476125] [2022-03-15 16:00:04,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:04,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:04,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:04,333 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:04,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-15 16:00:04,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:00:04,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:04,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:04,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:04,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:04,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 16:00:04,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 16:00:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:04,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:04,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:04,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:05,078 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:05,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:05,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:05,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063476125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:05,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:05,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:05,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324965646] [2022-03-15 16:00:05,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:05,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:05,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:05,086 INFO L87 Difference]: Start difference. First operand 315 states and 929 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:05,417 INFO L93 Difference]: Finished difference Result 611 states and 1774 transitions. [2022-03-15 16:00:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:00:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:05,418 INFO L225 Difference]: With dead ends: 611 [2022-03-15 16:00:05,418 INFO L226 Difference]: Without dead ends: 611 [2022-03-15 16:00:05,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:00:05,418 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 287 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:05,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 146 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-15 16:00:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 325. [2022-03-15 16:00:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0123456790123457) internal successors, (976), 324 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 976 transitions. [2022-03-15 16:00:05,422 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 976 transitions. Word has length 22 [2022-03-15 16:00:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:05,423 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 976 transitions. [2022-03-15 16:00:05,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 976 transitions. [2022-03-15 16:00:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:05,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:05,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:05,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-15 16:00:05,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:05,624 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1291545061, now seen corresponding path program 172 times [2022-03-15 16:00:05,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:05,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361048565] [2022-03-15 16:00:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:05,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:05,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:05,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361048565] [2022-03-15 16:00:05,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361048565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:05,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781866007] [2022-03-15 16:00:05,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:05,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:05,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:05,710 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:05,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-15 16:00:05,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:05,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:05,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:06,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 16:00:06,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:00:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:06,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:06,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:06,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:06,455 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:06,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:06,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:06,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781866007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:06,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:06,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:06,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134271727] [2022-03-15 16:00:06,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:06,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:06,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:06,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:06,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:06,462 INFO L87 Difference]: Start difference. First operand 325 states and 976 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:06,970 INFO L93 Difference]: Finished difference Result 653 states and 1876 transitions. [2022-03-15 16:00:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:00:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:06,971 INFO L225 Difference]: With dead ends: 653 [2022-03-15 16:00:06,971 INFO L226 Difference]: Without dead ends: 643 [2022-03-15 16:00:06,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:06,971 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 218 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:06,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 217 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-03-15 16:00:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 332. [2022-03-15 16:00:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2022-03-15 16:00:06,975 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 22 [2022-03-15 16:00:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:06,975 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2022-03-15 16:00:06,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2022-03-15 16:00:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:06,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:06,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:06,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:07,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:07,178 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1962347043, now seen corresponding path program 173 times [2022-03-15 16:00:07,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:07,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239685418] [2022-03-15 16:00:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:07,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:07,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:07,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239685418] [2022-03-15 16:00:07,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239685418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:07,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704467151] [2022-03-15 16:00:07,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:07,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:07,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:07,265 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:07,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-15 16:00:07,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:00:07,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:07,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:07,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 16:00:07,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-15 16:00:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:07,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:07,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:07,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:08,008 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:08,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:08,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:08,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704467151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:08,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:08,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:08,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380508343] [2022-03-15 16:00:08,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:08,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:08,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:08,015 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:08,413 INFO L93 Difference]: Finished difference Result 694 states and 1955 transitions. [2022-03-15 16:00:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:00:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:08,414 INFO L225 Difference]: With dead ends: 694 [2022-03-15 16:00:08,414 INFO L226 Difference]: Without dead ends: 694 [2022-03-15 16:00:08,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:00:08,414 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:08,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 225 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-15 16:00:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 323. [2022-03-15 16:00:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2022-03-15 16:00:08,419 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 22 [2022-03-15 16:00:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:08,419 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2022-03-15 16:00:08,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2022-03-15 16:00:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:08,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:08,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:08,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:08,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-03-15 16:00:08,622 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash 255790949, now seen corresponding path program 174 times [2022-03-15 16:00:08,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:08,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730433052] [2022-03-15 16:00:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:08,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:08,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730433052] [2022-03-15 16:00:08,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730433052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:08,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279513854] [2022-03-15 16:00:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:08,708 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:08,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-15 16:00:08,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:00:08,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:08,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:08,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:09,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:00:09,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-15 16:00:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:09,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:09,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:09,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:09,461 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:09,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:09,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:09,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279513854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:09,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:09,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:09,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415144190] [2022-03-15 16:00:09,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:09,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:09,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:09,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:09,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:09,468 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:09,752 INFO L93 Difference]: Finished difference Result 535 states and 1535 transitions. [2022-03-15 16:00:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:09,753 INFO L225 Difference]: With dead ends: 535 [2022-03-15 16:00:09,753 INFO L226 Difference]: Without dead ends: 526 [2022-03-15 16:00:09,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:09,753 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:09,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 151 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-15 16:00:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 329. [2022-03-15 16:00:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2022-03-15 16:00:09,765 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 22 [2022-03-15 16:00:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:09,766 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2022-03-15 16:00:09,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2022-03-15 16:00:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:09,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:09,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:09,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:09,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:09,990 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash 598040443, now seen corresponding path program 175 times [2022-03-15 16:00:09,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:09,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722321040] [2022-03-15 16:00:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:10,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:10,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722321040] [2022-03-15 16:00:10,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722321040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:10,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065584942] [2022-03-15 16:00:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:10,072 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:10,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-15 16:00:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:10,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:10,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:10,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:10,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-15 16:00:10,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-15 16:00:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:10,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:10,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:10,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:10,803 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:10,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:10,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:10,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065584942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:10,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:10,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:10,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143161940] [2022-03-15 16:00:10,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:10,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:10,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:10,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:10,810 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:11,312 INFO L93 Difference]: Finished difference Result 635 states and 1773 transitions. [2022-03-15 16:00:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:00:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:11,314 INFO L225 Difference]: With dead ends: 635 [2022-03-15 16:00:11,314 INFO L226 Difference]: Without dead ends: 625 [2022-03-15 16:00:11,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:00:11,314 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:11,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 219 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-15 16:00:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 351. [2022-03-15 16:00:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.974285714285714) internal successors, (1041), 350 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1041 transitions. [2022-03-15 16:00:11,318 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1041 transitions. Word has length 22 [2022-03-15 16:00:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:11,318 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1041 transitions. [2022-03-15 16:00:11,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1041 transitions. [2022-03-15 16:00:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:11,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:11,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:11,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-15 16:00:11,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:11,519 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash -982731473, now seen corresponding path program 176 times [2022-03-15 16:00:11,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:11,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688451755] [2022-03-15 16:00:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:11,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:11,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688451755] [2022-03-15 16:00:11,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688451755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:11,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627775176] [2022-03-15 16:00:11,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:11,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:11,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:11,608 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:11,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-15 16:00:11,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:11,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:12,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:00:12,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-15 16:00:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:12,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:12,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:12,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:12,314 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:12,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:12,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:12,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627775176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:12,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:12,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:12,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89049931] [2022-03-15 16:00:12,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:12,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:12,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:12,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:12,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:12,323 INFO L87 Difference]: Start difference. First operand 351 states and 1041 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:12,802 INFO L93 Difference]: Finished difference Result 592 states and 1662 transitions. [2022-03-15 16:00:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:00:12,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:12,803 INFO L225 Difference]: With dead ends: 592 [2022-03-15 16:00:12,803 INFO L226 Difference]: Without dead ends: 580 [2022-03-15 16:00:12,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:12,803 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:12,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 242 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-15 16:00:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 331. [2022-03-15 16:00:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9727272727272727) internal successors, (981), 330 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 981 transitions. [2022-03-15 16:00:12,807 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 981 transitions. Word has length 22 [2022-03-15 16:00:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:12,807 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 981 transitions. [2022-03-15 16:00:12,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 981 transitions. [2022-03-15 16:00:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:12,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:12,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:12,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-15 16:00:13,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:13,009 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash 396074085, now seen corresponding path program 177 times [2022-03-15 16:00:13,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:13,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224641657] [2022-03-15 16:00:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:13,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:13,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224641657] [2022-03-15 16:00:13,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224641657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:13,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220545071] [2022-03-15 16:00:13,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:13,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:13,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:13,085 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:13,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-15 16:00:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:00:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:13,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:13,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:13,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:13,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:13,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:13,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:13,780 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:13,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:13,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:13,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220545071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:13,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:13,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:13,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354561286] [2022-03-15 16:00:13,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:13,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:13,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:13,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:13,787 INFO L87 Difference]: Start difference. First operand 331 states and 981 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:14,140 INFO L93 Difference]: Finished difference Result 460 states and 1345 transitions. [2022-03-15 16:00:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:14,141 INFO L225 Difference]: With dead ends: 460 [2022-03-15 16:00:14,141 INFO L226 Difference]: Without dead ends: 440 [2022-03-15 16:00:14,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:14,141 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:14,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 158 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-15 16:00:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 337. [2022-03-15 16:00:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9583333333333335) internal successors, (994), 336 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 994 transitions. [2022-03-15 16:00:14,145 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 994 transitions. Word has length 22 [2022-03-15 16:00:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:14,145 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 994 transitions. [2022-03-15 16:00:14,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 994 transitions. [2022-03-15 16:00:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:14,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:14,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:14,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-15 16:00:14,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:14,346 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1363215055, now seen corresponding path program 178 times [2022-03-15 16:00:14,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:14,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936325663] [2022-03-15 16:00:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:14,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:14,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:14,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936325663] [2022-03-15 16:00:14,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936325663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:14,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106608014] [2022-03-15 16:00:14,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:14,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:14,424 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:14,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-15 16:00:14,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:14,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:14,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:14,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:14,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:14,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 16:00:14,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 16:00:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:14,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:15,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:15,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:15,161 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:15,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:15,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:15,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106608014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:15,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:15,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:15,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712880383] [2022-03-15 16:00:15,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:15,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:15,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:15,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:15,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:15,169 INFO L87 Difference]: Start difference. First operand 337 states and 994 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:15,581 INFO L93 Difference]: Finished difference Result 538 states and 1523 transitions. [2022-03-15 16:00:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:00:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:15,582 INFO L225 Difference]: With dead ends: 538 [2022-03-15 16:00:15,582 INFO L226 Difference]: Without dead ends: 528 [2022-03-15 16:00:15,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:15,583 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 187 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:15,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 188 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-15 16:00:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 359. [2022-03-15 16:00:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.9553072625698324) internal successors, (1058), 358 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1058 transitions. [2022-03-15 16:00:15,587 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1058 transitions. Word has length 22 [2022-03-15 16:00:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:15,587 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1058 transitions. [2022-03-15 16:00:15,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1058 transitions. [2022-03-15 16:00:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:15,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:15,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:15,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:15,788 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:15,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1350980325, now seen corresponding path program 179 times [2022-03-15 16:00:15,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:15,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386494070] [2022-03-15 16:00:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:15,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:15,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:15,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386494070] [2022-03-15 16:00:15,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386494070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:15,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338265185] [2022-03-15 16:00:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:15,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:15,866 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-15 16:00:16,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:00:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:16,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:00:16,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 16:00:16,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-15 16:00:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:16,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:16,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:16,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 16:00:16,533 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:16,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:16,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:16,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338265185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:16,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:16,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:16,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433367823] [2022-03-15 16:00:16,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:16,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:16,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:16,541 INFO L87 Difference]: Start difference. First operand 359 states and 1058 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:16,924 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2022-03-15 16:00:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:16,925 INFO L225 Difference]: With dead ends: 495 [2022-03-15 16:00:16,925 INFO L226 Difference]: Without dead ends: 480 [2022-03-15 16:00:16,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:16,926 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:16,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 179 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-03-15 16:00:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 333. [2022-03-15 16:00:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.966867469879518) internal successors, (985), 332 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 985 transitions. [2022-03-15 16:00:16,930 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 985 transitions. Word has length 22 [2022-03-15 16:00:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:16,930 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 985 transitions. [2022-03-15 16:00:16,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 985 transitions. [2022-03-15 16:00:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:16,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:16,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:16,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:17,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:17,131 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:17,131 INFO L85 PathProgramCache]: Analyzing trace with hash -24051833, now seen corresponding path program 180 times [2022-03-15 16:00:17,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:17,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956563989] [2022-03-15 16:00:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:17,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:17,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:17,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956563989] [2022-03-15 16:00:17,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956563989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:17,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915564454] [2022-03-15 16:00:17,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:17,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:17,220 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:17,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-15 16:00:17,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:00:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:17,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:17,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:17,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:00:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:17,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:17,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:17,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:17,907 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:17,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:17,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:17,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915564454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:17,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:17,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:17,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71067715] [2022-03-15 16:00:17,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:17,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:17,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:17,914 INFO L87 Difference]: Start difference. First operand 333 states and 985 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:18,166 INFO L93 Difference]: Finished difference Result 476 states and 1373 transitions. [2022-03-15 16:00:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:18,167 INFO L225 Difference]: With dead ends: 476 [2022-03-15 16:00:18,167 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 16:00:18,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:18,167 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:18,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 138 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 16:00:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 336. [2022-03-15 16:00:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.952238805970149) internal successors, (989), 335 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 989 transitions. [2022-03-15 16:00:18,174 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 989 transitions. Word has length 22 [2022-03-15 16:00:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:18,174 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 989 transitions. [2022-03-15 16:00:18,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 989 transitions. [2022-03-15 16:00:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:18,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:18,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:18,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:18,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-03-15 16:00:18,375 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1470551131, now seen corresponding path program 181 times [2022-03-15 16:00:18,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:18,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827343803] [2022-03-15 16:00:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:18,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:18,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:18,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827343803] [2022-03-15 16:00:18,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827343803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:18,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255261273] [2022-03-15 16:00:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:18,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:18,459 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:18,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 16:00:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:18,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:18,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:00:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:18,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:18,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:18,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:19,134 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:19,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:19,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:19,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255261273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:19,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:19,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:19,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082517860] [2022-03-15 16:00:19,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:19,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:19,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:19,142 INFO L87 Difference]: Start difference. First operand 336 states and 989 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:19,525 INFO L93 Difference]: Finished difference Result 507 states and 1449 transitions. [2022-03-15 16:00:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:19,526 INFO L225 Difference]: With dead ends: 507 [2022-03-15 16:00:19,526 INFO L226 Difference]: Without dead ends: 497 [2022-03-15 16:00:19,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:19,526 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:19,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 199 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-15 16:00:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 333. [2022-03-15 16:00:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9427710843373496) internal successors, (977), 332 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 977 transitions. [2022-03-15 16:00:19,530 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 977 transitions. Word has length 22 [2022-03-15 16:00:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:19,530 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 977 transitions. [2022-03-15 16:00:19,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 977 transitions. [2022-03-15 16:00:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:19,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:19,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:19,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-15 16:00:19,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:19,731 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1895498341, now seen corresponding path program 182 times [2022-03-15 16:00:19,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:19,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502028856] [2022-03-15 16:00:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:19,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:19,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502028856] [2022-03-15 16:00:19,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502028856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:19,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844058176] [2022-03-15 16:00:19,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:19,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:19,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:19,814 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:19,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 16:00:20,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:20,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:20,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:20,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:20,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:20,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:20,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:20,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:20,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844058176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:20,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:20,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:20,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398346553] [2022-03-15 16:00:20,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:20,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:20,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:20,461 INFO L87 Difference]: Start difference. First operand 333 states and 977 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:20,830 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2022-03-15 16:00:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:20,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:20,831 INFO L225 Difference]: With dead ends: 458 [2022-03-15 16:00:20,831 INFO L226 Difference]: Without dead ends: 438 [2022-03-15 16:00:20,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:20,832 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:20,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 208 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-15 16:00:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 315. [2022-03-15 16:00:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.945859872611465) internal successors, (925), 314 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 925 transitions. [2022-03-15 16:00:20,835 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 925 transitions. Word has length 22 [2022-03-15 16:00:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:20,835 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 925 transitions. [2022-03-15 16:00:20,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 925 transitions. [2022-03-15 16:00:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:20,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:20,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:20,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-15 16:00:21,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 16:00:21,036 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash -59659887, now seen corresponding path program 183 times [2022-03-15 16:00:21,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:21,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608120557] [2022-03-15 16:00:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:21,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:21,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:21,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608120557] [2022-03-15 16:00:21,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608120557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:21,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974832907] [2022-03-15 16:00:21,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:21,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:21,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:21,129 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:21,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 16:00:21,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:00:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:21,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:21,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:21,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:21,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:21,794 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:21,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:21,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:21,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974832907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:21,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:21,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:21,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29809958] [2022-03-15 16:00:21,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:21,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:21,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:21,802 INFO L87 Difference]: Start difference. First operand 315 states and 925 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:22,125 INFO L93 Difference]: Finished difference Result 535 states and 1557 transitions. [2022-03-15 16:00:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:22,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:22,126 INFO L225 Difference]: With dead ends: 535 [2022-03-15 16:00:22,127 INFO L226 Difference]: Without dead ends: 535 [2022-03-15 16:00:22,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:22,127 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:22,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 175 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-15 16:00:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 327. [2022-03-15 16:00:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2022-03-15 16:00:22,131 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 22 [2022-03-15 16:00:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:22,131 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2022-03-15 16:00:22,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2022-03-15 16:00:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:22,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:22,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:22,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:22,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 16:00:22,332 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1434943077, now seen corresponding path program 184 times [2022-03-15 16:00:22,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:22,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087495189] [2022-03-15 16:00:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:22,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:22,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087495189] [2022-03-15 16:00:22,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087495189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:22,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876411245] [2022-03-15 16:00:22,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:22,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:22,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:22,423 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:22,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 16:00:22,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:22,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:22,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:22,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:22,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:23,077 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:23,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:23,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:23,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876411245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:23,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:23,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:23,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523541522] [2022-03-15 16:00:23,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:23,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:23,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:23,084 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:23,363 INFO L93 Difference]: Finished difference Result 511 states and 1483 transitions. [2022-03-15 16:00:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:23,363 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:23,364 INFO L225 Difference]: With dead ends: 511 [2022-03-15 16:00:23,364 INFO L226 Difference]: Without dead ends: 501 [2022-03-15 16:00:23,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:23,364 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:23,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:23,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-15 16:00:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 334. [2022-03-15 16:00:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.963963963963964) internal successors, (987), 333 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 987 transitions. [2022-03-15 16:00:23,368 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 987 transitions. Word has length 22 [2022-03-15 16:00:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:23,368 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 987 transitions. [2022-03-15 16:00:23,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 987 transitions. [2022-03-15 16:00:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:23,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:23,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:23,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-15 16:00:23,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-15 16:00:23,569 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1115830757, now seen corresponding path program 185 times [2022-03-15 16:00:23,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:23,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331616310] [2022-03-15 16:00:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:23,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:23,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331616310] [2022-03-15 16:00:23,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331616310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:23,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995353601] [2022-03-15 16:00:23,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:23,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:23,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:23,663 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:23,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 16:00:23,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:23,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:23,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:24,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:24,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:24,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:24,315 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:24,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:24,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:24,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995353601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:24,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:24,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:24,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881663481] [2022-03-15 16:00:24,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:24,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:24,323 INFO L87 Difference]: Start difference. First operand 334 states and 987 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:24,645 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2022-03-15 16:00:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:24,646 INFO L225 Difference]: With dead ends: 435 [2022-03-15 16:00:24,646 INFO L226 Difference]: Without dead ends: 435 [2022-03-15 16:00:24,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:24,646 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:24,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 187 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-15 16:00:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 312. [2022-03-15 16:00:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2022-03-15 16:00:24,650 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 22 [2022-03-15 16:00:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:24,650 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2022-03-15 16:00:24,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2022-03-15 16:00:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:24,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:24,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:24,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-15 16:00:24,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:24,851 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1546790043, now seen corresponding path program 186 times [2022-03-15 16:00:24,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:24,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961465485] [2022-03-15 16:00:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:24,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:24,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961465485] [2022-03-15 16:00:24,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961465485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607580241] [2022-03-15 16:00:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:24,944 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:24,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 16:00:25,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:00:25,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:25,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:25,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:25,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:25,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 16:00:25,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 16:00:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:25,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:25,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:25,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:25,710 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:25,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:25,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:25,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607580241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:25,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:25,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:25,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411142769] [2022-03-15 16:00:25,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:25,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:25,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:25,717 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:26,184 INFO L93 Difference]: Finished difference Result 691 states and 1976 transitions. [2022-03-15 16:00:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:00:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:26,185 INFO L225 Difference]: With dead ends: 691 [2022-03-15 16:00:26,185 INFO L226 Difference]: Without dead ends: 691 [2022-03-15 16:00:26,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:26,185 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:26,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 235 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-15 16:00:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 326. [2022-03-15 16:00:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0123076923076924) internal successors, (979), 325 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 979 transitions. [2022-03-15 16:00:26,190 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 979 transitions. Word has length 22 [2022-03-15 16:00:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:26,190 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 979 transitions. [2022-03-15 16:00:26,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 979 transitions. [2022-03-15 16:00:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:26,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:26,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:26,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-15 16:00:26,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-15 16:00:26,391 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:26,391 INFO L85 PathProgramCache]: Analyzing trace with hash -52187079, now seen corresponding path program 187 times [2022-03-15 16:00:26,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:26,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26860893] [2022-03-15 16:00:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:26,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:26,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:26,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26860893] [2022-03-15 16:00:26,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26860893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:26,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720506979] [2022-03-15 16:00:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:26,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:26,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:26,483 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:26,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 16:00:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:26,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:26,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:26,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:26,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 16:00:26,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 16:00:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:26,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:27,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:27,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:27,221 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:27,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:27,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:27,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720506979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:27,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:27,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:27,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318422188] [2022-03-15 16:00:27,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:27,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:27,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:27,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:27,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:27,229 INFO L87 Difference]: Start difference. First operand 326 states and 979 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:27,652 INFO L93 Difference]: Finished difference Result 743 states and 2090 transitions. [2022-03-15 16:00:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:00:27,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:27,653 INFO L225 Difference]: With dead ends: 743 [2022-03-15 16:00:27,653 INFO L226 Difference]: Without dead ends: 733 [2022-03-15 16:00:27,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:00:27,654 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 258 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:27,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 198 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-15 16:00:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 333. [2022-03-15 16:00:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9909638554216866) internal successors, (993), 332 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 993 transitions. [2022-03-15 16:00:27,658 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 993 transitions. Word has length 22 [2022-03-15 16:00:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:27,658 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 993 transitions. [2022-03-15 16:00:27,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 993 transitions. [2022-03-15 16:00:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:27,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:27,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:27,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:27,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-15 16:00:27,859 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash 988888113, now seen corresponding path program 188 times [2022-03-15 16:00:27,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:27,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48079913] [2022-03-15 16:00:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:27,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:27,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:27,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48079913] [2022-03-15 16:00:27,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48079913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:27,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042582763] [2022-03-15 16:00:27,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:27,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:27,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:27,953 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:27,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 16:00:28,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:28,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:28,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:28,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 16:00:28,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 16:00:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:28,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:28,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:28,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:28,687 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:28,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:28,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:28,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042582763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:28,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:28,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:28,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810347539] [2022-03-15 16:00:28,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:28,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:28,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:28,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:28,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:28,695 INFO L87 Difference]: Start difference. First operand 333 states and 993 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:29,138 INFO L93 Difference]: Finished difference Result 700 states and 2006 transitions. [2022-03-15 16:00:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:00:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:29,139 INFO L225 Difference]: With dead ends: 700 [2022-03-15 16:00:29,139 INFO L226 Difference]: Without dead ends: 700 [2022-03-15 16:00:29,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:00:29,139 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:29,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 174 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-15 16:00:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 339. [2022-03-15 16:00:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0177514792899407) internal successors, (1020), 338 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1020 transitions. [2022-03-15 16:00:29,145 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1020 transitions. Word has length 22 [2022-03-15 16:00:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:29,145 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1020 transitions. [2022-03-15 16:00:29,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1020 transitions. [2022-03-15 16:00:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:29,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:29,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:29,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:29,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-15 16:00:29,346 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1087941191, now seen corresponding path program 189 times [2022-03-15 16:00:29,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:29,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563784013] [2022-03-15 16:00:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:29,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:29,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:29,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563784013] [2022-03-15 16:00:29,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563784013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:29,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108172628] [2022-03-15 16:00:29,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:29,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:29,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:29,435 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:29,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 16:00:29,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:00:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:29,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:29,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 16:00:29,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 16:00:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:30,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:30,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:30,163 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:30,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:30,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:30,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108172628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:30,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:30,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:30,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983540737] [2022-03-15 16:00:30,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:30,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:30,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:30,171 INFO L87 Difference]: Start difference. First operand 339 states and 1020 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:30,498 INFO L93 Difference]: Finished difference Result 649 states and 1853 transitions. [2022-03-15 16:00:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:00:30,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:30,499 INFO L225 Difference]: With dead ends: 649 [2022-03-15 16:00:30,499 INFO L226 Difference]: Without dead ends: 640 [2022-03-15 16:00:30,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:00:30,499 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 211 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:30,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 154 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-15 16:00:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2022-03-15 16:00:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0) internal successors, (1032), 344 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1032 transitions. [2022-03-15 16:00:30,504 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1032 transitions. Word has length 22 [2022-03-15 16:00:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:30,504 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1032 transitions. [2022-03-15 16:00:30,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1032 transitions. [2022-03-15 16:00:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:30,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:30,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:30,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-15 16:00:30,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:30,705 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:30,705 INFO L85 PathProgramCache]: Analyzing trace with hash -745691697, now seen corresponding path program 190 times [2022-03-15 16:00:30,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:30,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787414671] [2022-03-15 16:00:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:30,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:30,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:30,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787414671] [2022-03-15 16:00:30,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787414671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:30,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198325] [2022-03-15 16:00:30,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:30,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:30,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:30,792 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:30,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 16:00:30,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:30,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:31,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:31,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-15 16:00:31,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-15 16:00:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:31,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:31,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:31,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:31,464 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:31,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:31,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:31,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:31,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:31,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:31,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615053865] [2022-03-15 16:00:31,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:31,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:31,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:31,471 INFO L87 Difference]: Start difference. First operand 345 states and 1032 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:31,828 INFO L93 Difference]: Finished difference Result 662 states and 1863 transitions. [2022-03-15 16:00:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:00:31,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:31,829 INFO L225 Difference]: With dead ends: 662 [2022-03-15 16:00:31,829 INFO L226 Difference]: Without dead ends: 652 [2022-03-15 16:00:31,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:31,830 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 193 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:31,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 162 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-03-15 16:00:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 357. [2022-03-15 16:00:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.00561797752809) internal successors, (1070), 356 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1070 transitions. [2022-03-15 16:00:31,834 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1070 transitions. Word has length 22 [2022-03-15 16:00:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:31,834 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1070 transitions. [2022-03-15 16:00:31,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1070 transitions. [2022-03-15 16:00:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:31,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:31,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:31,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-15 16:00:32,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:32,036 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1968503683, now seen corresponding path program 191 times [2022-03-15 16:00:32,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:32,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605117812] [2022-03-15 16:00:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:32,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:32,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:32,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605117812] [2022-03-15 16:00:32,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605117812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:32,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641473459] [2022-03-15 16:00:32,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:32,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:32,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:32,125 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:32,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 16:00:32,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:00:32,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:32,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:32,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:32,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-15 16:00:32,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-15 16:00:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:32,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:32,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:32,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 16:00:32,778 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:32,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:32,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:32,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641473459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:32,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:32,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:32,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923871407] [2022-03-15 16:00:32,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:32,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:32,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:32,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:32,785 INFO L87 Difference]: Start difference. First operand 357 states and 1070 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:33,150 INFO L93 Difference]: Finished difference Result 576 states and 1655 transitions. [2022-03-15 16:00:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:33,151 INFO L225 Difference]: With dead ends: 576 [2022-03-15 16:00:33,151 INFO L226 Difference]: Without dead ends: 564 [2022-03-15 16:00:33,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:33,151 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:33,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 178 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-15 16:00:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 353. [2022-03-15 16:00:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0056818181818183) internal successors, (1058), 352 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1058 transitions. [2022-03-15 16:00:33,155 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1058 transitions. Word has length 22 [2022-03-15 16:00:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:33,156 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1058 transitions. [2022-03-15 16:00:33,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1058 transitions. [2022-03-15 16:00:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:33,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:33,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:33,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-15 16:00:33,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:33,357 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1687399163, now seen corresponding path program 192 times [2022-03-15 16:00:33,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:33,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668323539] [2022-03-15 16:00:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:33,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:33,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:33,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668323539] [2022-03-15 16:00:33,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668323539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:33,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899881111] [2022-03-15 16:00:33,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:33,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:33,453 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:33,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 16:00:33,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:00:33,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:33,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:33,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:33,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:33,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:34,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:34,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:34,235 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:34,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:34,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:34,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899881111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:34,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:34,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:00:34,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584171898] [2022-03-15 16:00:34,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:34,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:00:34,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:00:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:00:34,242 INFO L87 Difference]: Start difference. First operand 353 states and 1058 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:34,589 INFO L93 Difference]: Finished difference Result 575 states and 1670 transitions. [2022-03-15 16:00:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:00:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:34,590 INFO L225 Difference]: With dead ends: 575 [2022-03-15 16:00:34,590 INFO L226 Difference]: Without dead ends: 575 [2022-03-15 16:00:34,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:00:34,590 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 152 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:34,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 175 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-15 16:00:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 358. [2022-03-15 16:00:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2022-03-15 16:00:34,594 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2022-03-15 16:00:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:34,595 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2022-03-15 16:00:34,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2022-03-15 16:00:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:34,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:34,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:34,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-15 16:00:34,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-15 16:00:34,796 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1112965169, now seen corresponding path program 193 times [2022-03-15 16:00:34,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:34,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222762329] [2022-03-15 16:00:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:34,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:34,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222762329] [2022-03-15 16:00:34,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222762329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:34,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413555095] [2022-03-15 16:00:34,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:34,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:34,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:34,889 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:34,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 16:00:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:35,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:35,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-03-15 16:00:35,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-15 16:00:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:35,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:35,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:35,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:35,618 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:35,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:35,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:35,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413555095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:35,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:35,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:35,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634050815] [2022-03-15 16:00:35,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:35,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:35,626 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:35,952 INFO L93 Difference]: Finished difference Result 551 states and 1605 transitions. [2022-03-15 16:00:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:35,953 INFO L225 Difference]: With dead ends: 551 [2022-03-15 16:00:35,953 INFO L226 Difference]: Without dead ends: 541 [2022-03-15 16:00:35,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:35,953 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:35,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 174 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-03-15 16:00:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 337. [2022-03-15 16:00:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9702380952380953) internal successors, (998), 336 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 998 transitions. [2022-03-15 16:00:35,957 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 998 transitions. Word has length 22 [2022-03-15 16:00:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:35,957 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 998 transitions. [2022-03-15 16:00:35,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 998 transitions. [2022-03-15 16:00:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:35,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:35,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:35,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-15 16:00:36,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-15 16:00:36,158 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1638885455, now seen corresponding path program 194 times [2022-03-15 16:00:36,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:36,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328578115] [2022-03-15 16:00:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:36,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:36,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328578115] [2022-03-15 16:00:36,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328578115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:36,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193054708] [2022-03-15 16:00:36,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:36,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:36,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:36,258 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:36,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 16:00:36,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:36,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:36,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:36,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:36,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:36,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:36,949 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:36,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:36,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:36,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193054708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:36,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:36,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:36,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103750893] [2022-03-15 16:00:36,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:36,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:36,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:36,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:36,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:36,957 INFO L87 Difference]: Start difference. First operand 337 states and 998 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:37,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:37,339 INFO L93 Difference]: Finished difference Result 480 states and 1423 transitions. [2022-03-15 16:00:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:37,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:37,340 INFO L225 Difference]: With dead ends: 480 [2022-03-15 16:00:37,340 INFO L226 Difference]: Without dead ends: 480 [2022-03-15 16:00:37,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:37,340 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:37,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:37,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-03-15 16:00:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 334. [2022-03-15 16:00:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.96996996996997) internal successors, (989), 333 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 989 transitions. [2022-03-15 16:00:37,344 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 989 transitions. Word has length 22 [2022-03-15 16:00:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:37,344 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 989 transitions. [2022-03-15 16:00:37,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 989 transitions. [2022-03-15 16:00:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:37,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:37,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:37,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-15 16:00:37,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-15 16:00:37,545 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1132668067, now seen corresponding path program 195 times [2022-03-15 16:00:37,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:37,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626684348] [2022-03-15 16:00:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:37,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:37,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626684348] [2022-03-15 16:00:37,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626684348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:37,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186373512] [2022-03-15 16:00:37,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:37,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:37,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:37,647 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:37,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 16:00:37,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:00:37,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:00:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:37,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:00:37,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2022-03-15 16:00:37,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-03-15 16:00:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:38,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:38,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2022-03-15 16:00:38,778 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:38,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:38,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-15 16:00:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:38,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186373512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:38,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:38,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-03-15 16:00:38,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225929283] [2022-03-15 16:00:38,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:38,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:00:38,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:00:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:00:38,785 INFO L87 Difference]: Start difference. First operand 334 states and 989 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:39,257 INFO L93 Difference]: Finished difference Result 785 states and 2241 transitions. [2022-03-15 16:00:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:00:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:39,258 INFO L225 Difference]: With dead ends: 785 [2022-03-15 16:00:39,258 INFO L226 Difference]: Without dead ends: 734 [2022-03-15 16:00:39,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:00:39,258 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:39,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 194 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-15 16:00:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 354. [2022-03-15 16:00:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.028328611898017) internal successors, (1069), 353 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1069 transitions. [2022-03-15 16:00:39,263 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1069 transitions. Word has length 22 [2022-03-15 16:00:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:39,263 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1069 transitions. [2022-03-15 16:00:39,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1069 transitions. [2022-03-15 16:00:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:39,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:39,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:39,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:39,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-15 16:00:39,464 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1085469925, now seen corresponding path program 196 times [2022-03-15 16:00:39,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:39,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074247391] [2022-03-15 16:00:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:39,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:39,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074247391] [2022-03-15 16:00:39,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074247391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:39,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220133746] [2022-03-15 16:00:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:39,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:39,559 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:39,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 16:00:39,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:39,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:39,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:39,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:40,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:40,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:40,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:40,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:40,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:40,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:40,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220133746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:40,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:40,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:40,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840053236] [2022-03-15 16:00:40,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:40,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:40,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:40,268 INFO L87 Difference]: Start difference. First operand 354 states and 1069 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:40,593 INFO L93 Difference]: Finished difference Result 485 states and 1410 transitions. [2022-03-15 16:00:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:40,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:40,594 INFO L225 Difference]: With dead ends: 485 [2022-03-15 16:00:40,594 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 16:00:40,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:40,595 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:40,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 175 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 16:00:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 362. [2022-03-15 16:00:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.011080332409972) internal successors, (1087), 361 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1087 transitions. [2022-03-15 16:00:40,599 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1087 transitions. Word has length 22 [2022-03-15 16:00:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:40,599 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1087 transitions. [2022-03-15 16:00:40,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1087 transitions. [2022-03-15 16:00:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:40,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:40,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:40,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-15 16:00:40,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-03-15 16:00:40,800 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1049870599, now seen corresponding path program 197 times [2022-03-15 16:00:40,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:40,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681760226] [2022-03-15 16:00:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:40,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:40,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681760226] [2022-03-15 16:00:40,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681760226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:40,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937526277] [2022-03-15 16:00:40,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:40,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:40,906 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:40,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 16:00:41,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:00:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:41,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:41,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:41,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:41,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:41,572 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:00:41,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:00:41,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:41,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937526277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:41,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:41,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:41,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451754670] [2022-03-15 16:00:41,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:41,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:41,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:41,580 INFO L87 Difference]: Start difference. First operand 362 states and 1087 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:41,852 INFO L93 Difference]: Finished difference Result 449 states and 1342 transitions. [2022-03-15 16:00:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:41,853 INFO L225 Difference]: With dead ends: 449 [2022-03-15 16:00:41,853 INFO L226 Difference]: Without dead ends: 449 [2022-03-15 16:00:41,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:41,853 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:41,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 121 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:00:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-15 16:00:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 329. [2022-03-15 16:00:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2022-03-15 16:00:41,857 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2022-03-15 16:00:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:41,857 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2022-03-15 16:00:41,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2022-03-15 16:00:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:41,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:41,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:41,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-15 16:00:42,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:42,058 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2103683403, now seen corresponding path program 198 times [2022-03-15 16:00:42,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:42,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376502187] [2022-03-15 16:00:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:00:42,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:42,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376502187] [2022-03-15 16:00:42,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376502187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:42,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275437929] [2022-03-15 16:00:42,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:42,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:42,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:42,132 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:42,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 16:00:42,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:00:42,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:42,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:42,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:42,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:42,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:42,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:42,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 16:00:42,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:42,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:42,776 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:42,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:42,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275437929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:42,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:42,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-03-15 16:00:42,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743454939] [2022-03-15 16:00:42,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:42,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:42,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:42,783 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:44,244 INFO L93 Difference]: Finished difference Result 1265 states and 3638 transitions. [2022-03-15 16:00:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:00:44,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:44,246 INFO L225 Difference]: With dead ends: 1265 [2022-03-15 16:00:44,246 INFO L226 Difference]: Without dead ends: 1115 [2022-03-15 16:00:44,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:00:44,246 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 239 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:44,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 497 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:00:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-03-15 16:00:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 339. [2022-03-15 16:00:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2022-03-15 16:00:44,252 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2022-03-15 16:00:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:44,252 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2022-03-15 16:00:44,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:44,252 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2022-03-15 16:00:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:44,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:44,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:44,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-15 16:00:44,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-03-15 16:00:44,453 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1885422411, now seen corresponding path program 199 times [2022-03-15 16:00:44,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:44,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632923568] [2022-03-15 16:00:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:44,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:44,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632923568] [2022-03-15 16:00:44,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632923568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:44,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805479632] [2022-03-15 16:00:44,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:44,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:44,523 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:44,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 16:00:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:44,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:44,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:00:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:45,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:45,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-15 16:00:45,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:45,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:45,192 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:45,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:45,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805479632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:45,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:45,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-15 16:00:45,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474635190] [2022-03-15 16:00:45,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:45,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:45,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:45,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:45,200 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:46,595 INFO L93 Difference]: Finished difference Result 1036 states and 3022 transitions. [2022-03-15 16:00:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:00:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:46,597 INFO L225 Difference]: With dead ends: 1036 [2022-03-15 16:00:46,597 INFO L226 Difference]: Without dead ends: 934 [2022-03-15 16:00:46,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=602, Invalid=2478, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:00:46,597 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 188 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:46,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 596 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:00:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-15 16:00:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 304. [2022-03-15 16:00:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-15 16:00:46,602 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-15 16:00:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:46,602 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-15 16:00:46,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-15 16:00:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:46,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:46,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:46,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-15 16:00:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-15 16:00:46,803 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2078687993, now seen corresponding path program 200 times [2022-03-15 16:00:46,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:46,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145995428] [2022-03-15 16:00:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:46,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:46,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:46,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145995428] [2022-03-15 16:00:46,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145995428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:46,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827744524] [2022-03-15 16:00:46,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:46,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:46,914 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:46,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-15 16:00:47,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:47,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:47,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:47,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:47,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 16:00:47,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:47,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:47,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:47,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:00:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:47,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:47,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:47,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:47,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:47,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:47,648 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:47,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:47,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827744524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:47,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:47,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 16:00:47,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191750540] [2022-03-15 16:00:47,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:47,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:00:47,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:47,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:00:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:00:47,659 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:47,855 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2022-03-15 16:00:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:00:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:47,856 INFO L225 Difference]: With dead ends: 455 [2022-03-15 16:00:47,856 INFO L226 Difference]: Without dead ends: 455 [2022-03-15 16:00:47,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:47,856 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 89 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:47,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 144 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 224 Unchecked, 0.1s Time] [2022-03-15 16:00:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-03-15 16:00:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 318. [2022-03-15 16:00:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.965299684542587) internal successors, (940), 317 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 940 transitions. [2022-03-15 16:00:47,860 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 940 transitions. Word has length 22 [2022-03-15 16:00:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:47,860 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 940 transitions. [2022-03-15 16:00:47,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 940 transitions. [2022-03-15 16:00:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:47,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:47,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:47,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-15 16:00:48,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:48,061 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:48,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1709203663, now seen corresponding path program 201 times [2022-03-15 16:00:48,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:48,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315345924] [2022-03-15 16:00:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:48,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:48,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:48,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315345924] [2022-03-15 16:00:48,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315345924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:48,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099396130] [2022-03-15 16:00:48,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:48,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:48,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:48,169 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:48,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-15 16:00:48,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:00:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:48,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:48,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 16:00:48,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:48,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:48,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:00:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:48,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:48,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:48,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:48,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:48,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:48,879 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:48,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:48,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099396130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:48,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:48,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:48,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110019717] [2022-03-15 16:00:48,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:48,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:48,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:48,891 INFO L87 Difference]: Start difference. First operand 318 states and 940 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:49,276 INFO L93 Difference]: Finished difference Result 485 states and 1414 transitions. [2022-03-15 16:00:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:00:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:49,277 INFO L225 Difference]: With dead ends: 485 [2022-03-15 16:00:49,277 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 16:00:49,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:49,277 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:49,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 172 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 429 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2022-03-15 16:00:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 16:00:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 336. [2022-03-15 16:00:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.976119402985075) internal successors, (997), 335 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 997 transitions. [2022-03-15 16:00:49,281 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 997 transitions. Word has length 22 [2022-03-15 16:00:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:49,281 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 997 transitions. [2022-03-15 16:00:49,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 997 transitions. [2022-03-15 16:00:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:49,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:49,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:49,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:49,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:49,482 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:49,483 INFO L85 PathProgramCache]: Analyzing trace with hash -696511131, now seen corresponding path program 202 times [2022-03-15 16:00:49,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:49,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620163131] [2022-03-15 16:00:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:49,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:49,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620163131] [2022-03-15 16:00:49,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620163131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:49,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293200750] [2022-03-15 16:00:49,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:49,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:49,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:49,580 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:49,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-15 16:00:49,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:49,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:50,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:50,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-15 16:00:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:50,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:50,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:50,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:50,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:50,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:50,298 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:50,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:50,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293200750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:50,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:50,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 16:00:50,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970535197] [2022-03-15 16:00:50,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:50,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:00:50,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:50,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:00:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:00:50,310 INFO L87 Difference]: Start difference. First operand 336 states and 997 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:50,945 INFO L93 Difference]: Finished difference Result 568 states and 1645 transitions. [2022-03-15 16:00:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:00:50,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:50,946 INFO L225 Difference]: With dead ends: 568 [2022-03-15 16:00:50,946 INFO L226 Difference]: Without dead ends: 428 [2022-03-15 16:00:50,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:00:50,946 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:50,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 220 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:00:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-15 16:00:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 348. [2022-03-15 16:00:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.962536023054755) internal successors, (1028), 347 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1028 transitions. [2022-03-15 16:00:50,950 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1028 transitions. Word has length 22 [2022-03-15 16:00:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:50,950 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1028 transitions. [2022-03-15 16:00:50,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1028 transitions. [2022-03-15 16:00:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:50,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:50,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:50,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:51,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-03-15 16:00:51,152 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1038452195, now seen corresponding path program 203 times [2022-03-15 16:00:51,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:51,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666016140] [2022-03-15 16:00:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:51,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:51,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666016140] [2022-03-15 16:00:51,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666016140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:51,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966486908] [2022-03-15 16:00:51,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:00:51,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:51,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:51,242 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:51,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-15 16:00:51,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:51,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:51,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:51,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:51,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:51,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:51,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:51,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:51,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:51,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-15 16:00:51,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:51,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:51,928 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:51,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:51,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966486908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:51,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:51,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:51,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606101817] [2022-03-15 16:00:51,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:51,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:51,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:51,939 INFO L87 Difference]: Start difference. First operand 348 states and 1028 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:52,640 INFO L93 Difference]: Finished difference Result 798 states and 2298 transitions. [2022-03-15 16:00:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:00:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:52,642 INFO L225 Difference]: With dead ends: 798 [2022-03-15 16:00:52,642 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 16:00:52,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:00:52,642 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:52,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 312 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1203 Invalid, 0 Unknown, 21 Unchecked, 0.4s Time] [2022-03-15 16:00:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 16:00:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 376. [2022-03-15 16:00:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.04) internal successors, (1140), 375 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1140 transitions. [2022-03-15 16:00:52,647 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1140 transitions. Word has length 22 [2022-03-15 16:00:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:52,647 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1140 transitions. [2022-03-15 16:00:52,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1140 transitions. [2022-03-15 16:00:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:52,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:52,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:52,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:52,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-15 16:00:52,861 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash -668967865, now seen corresponding path program 204 times [2022-03-15 16:00:52,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:52,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57220585] [2022-03-15 16:00:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:52,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:00:52,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:52,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57220585] [2022-03-15 16:00:52,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57220585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:52,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39694831] [2022-03-15 16:00:52,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:00:52,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:52,943 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:52,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-15 16:00:53,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:00:53,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:53,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:53,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:53,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:53,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:53,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:53,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:53,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:53,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:53,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:53,622 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:53,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:53,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39694831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:53,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:53,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-15 16:00:53,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625694379] [2022-03-15 16:00:53,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:53,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:00:53,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:53,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:00:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:00:53,635 INFO L87 Difference]: Start difference. First operand 376 states and 1140 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:54,081 INFO L93 Difference]: Finished difference Result 681 states and 1981 transitions. [2022-03-15 16:00:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:00:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:54,082 INFO L225 Difference]: With dead ends: 681 [2022-03-15 16:00:54,082 INFO L226 Difference]: Without dead ends: 585 [2022-03-15 16:00:54,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:54,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:54,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 236 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 973 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-03-15 16:00:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-15 16:00:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 388. [2022-03-15 16:00:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.020671834625323) internal successors, (1169), 387 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1169 transitions. [2022-03-15 16:00:54,087 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1169 transitions. Word has length 22 [2022-03-15 16:00:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:54,087 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1169 transitions. [2022-03-15 16:00:54,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1169 transitions. [2022-03-15 16:00:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:54,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:54,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:54,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:54,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:54,288 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash -450706873, now seen corresponding path program 205 times [2022-03-15 16:00:54,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:54,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258112733] [2022-03-15 16:00:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:54,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:54,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258112733] [2022-03-15 16:00:54,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258112733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:54,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361592253] [2022-03-15 16:00:54,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:00:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:54,379 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:54,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-15 16:00:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:54,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:54,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:54,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:54,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:55,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:55,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:55,050 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:55,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:55,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361592253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:55,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:55,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 16:00:55,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930866308] [2022-03-15 16:00:55,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:55,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:00:55,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:00:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:00:55,062 INFO L87 Difference]: Start difference. First operand 388 states and 1169 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:55,292 INFO L93 Difference]: Finished difference Result 472 states and 1418 transitions. [2022-03-15 16:00:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:00:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:55,293 INFO L225 Difference]: With dead ends: 472 [2022-03-15 16:00:55,293 INFO L226 Difference]: Without dead ends: 472 [2022-03-15 16:00:55,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:00:55,293 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:55,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 129 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 440 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-03-15 16:00:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-15 16:00:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 389. [2022-03-15 16:00:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.0231958762886597) internal successors, (1173), 388 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1173 transitions. [2022-03-15 16:00:55,298 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1173 transitions. Word has length 22 [2022-03-15 16:00:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:55,298 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1173 transitions. [2022-03-15 16:00:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1173 transitions. [2022-03-15 16:00:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:55,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:55,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:55,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:55,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-15 16:00:55,499 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash 307691045, now seen corresponding path program 206 times [2022-03-15 16:00:55,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:55,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100797279] [2022-03-15 16:00:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:55,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:55,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100797279] [2022-03-15 16:00:55,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100797279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:55,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762293289] [2022-03-15 16:00:55,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:55,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:55,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:55,610 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:55,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-15 16:00:55,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:55,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 16:00:56,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:56,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:56,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:56,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:00:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:56,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:56,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:56,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:56,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:56,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:56,354 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:56,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:56,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762293289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:56,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:56,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:56,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402478706] [2022-03-15 16:00:56,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:56,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:56,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:56,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:56,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:56,365 INFO L87 Difference]: Start difference. First operand 389 states and 1173 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:56,807 INFO L93 Difference]: Finished difference Result 700 states and 2043 transitions. [2022-03-15 16:00:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:00:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:56,809 INFO L225 Difference]: With dead ends: 700 [2022-03-15 16:00:56,809 INFO L226 Difference]: Without dead ends: 633 [2022-03-15 16:00:56,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:00:56,809 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:56,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 213 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 577 Invalid, 0 Unknown, 313 Unchecked, 0.2s Time] [2022-03-15 16:00:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-15 16:00:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 396. [2022-03-15 16:00:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.017721518987342) internal successors, (1192), 395 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1192 transitions. [2022-03-15 16:00:56,815 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1192 transitions. Word has length 22 [2022-03-15 16:00:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:56,815 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1192 transitions. [2022-03-15 16:00:56,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1192 transitions. [2022-03-15 16:00:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:56,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:56,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:56,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:57,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-15 16:00:57,038 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1425035881, now seen corresponding path program 207 times [2022-03-15 16:00:57,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:57,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325750407] [2022-03-15 16:00:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:57,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:57,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325750407] [2022-03-15 16:00:57,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325750407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:57,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660757967] [2022-03-15 16:00:57,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:00:57,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:57,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:57,148 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:57,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-15 16:00:57,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:00:57,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:57,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:57,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:57,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:57,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-15 16:00:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:57,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:57,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:57,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:00:57,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:57,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:57,919 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:57,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:57,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660757967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:57,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:57,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 16:00:57,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839697114] [2022-03-15 16:00:57,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:57,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:00:57,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:57,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:00:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:00:57,930 INFO L87 Difference]: Start difference. First operand 396 states and 1192 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:58,316 INFO L93 Difference]: Finished difference Result 643 states and 1846 transitions. [2022-03-15 16:00:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:00:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:58,318 INFO L225 Difference]: With dead ends: 643 [2022-03-15 16:00:58,318 INFO L226 Difference]: Without dead ends: 610 [2022-03-15 16:00:58,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:58,318 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:58,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 216 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 812 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2022-03-15 16:00:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-15 16:00:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 387. [2022-03-15 16:00:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.010362694300518) internal successors, (1162), 386 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1162 transitions. [2022-03-15 16:00:58,324 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1162 transitions. Word has length 22 [2022-03-15 16:00:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:58,324 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1162 transitions. [2022-03-15 16:00:58,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1162 transitions. [2022-03-15 16:00:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:58,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:58,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:58,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:58,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-15 16:00:58,527 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:00:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1601709517, now seen corresponding path program 208 times [2022-03-15 16:00:58,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:58,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604020895] [2022-03-15 16:00:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:58,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:58,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604020895] [2022-03-15 16:00:58,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604020895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:58,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763563668] [2022-03-15 16:00:58,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:00:58,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:58,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:58,634 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:58,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-15 16:00:58,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:00:58,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:00:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:59,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:00:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:59,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:00:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:59,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:59,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:59,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:00:59,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:59,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:00:59,333 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:00:59,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:00:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:59,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763563668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:59,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:59,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:00:59,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630564991] [2022-03-15 16:00:59,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:59,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:00:59,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:00:59,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:00:59,345 INFO L87 Difference]: Start difference. First operand 387 states and 1162 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:59,813 INFO L93 Difference]: Finished difference Result 611 states and 1772 transitions. [2022-03-15 16:00:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:00:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:00:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:59,814 INFO L225 Difference]: With dead ends: 611 [2022-03-15 16:00:59,814 INFO L226 Difference]: Without dead ends: 611 [2022-03-15 16:00:59,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:00:59,815 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:59,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 178 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:00:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-15 16:00:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 371. [2022-03-15 16:00:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0108108108108107) internal successors, (1114), 370 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1114 transitions. [2022-03-15 16:00:59,819 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1114 transitions. Word has length 22 [2022-03-15 16:00:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:59,819 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1114 transitions. [2022-03-15 16:00:59,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1114 transitions. [2022-03-15 16:00:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:00:59,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:59,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:59,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-15 16:01:00,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:00,020 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:00,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2012970719, now seen corresponding path program 209 times [2022-03-15 16:01:00,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:00,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369109160] [2022-03-15 16:01:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:00,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:00,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:00,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369109160] [2022-03-15 16:01:00,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369109160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:00,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864613998] [2022-03-15 16:01:00,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:00,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:00,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:00,290 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:00,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-15 16:01:00,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:01:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:00,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:01:00,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:00,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-15 16:01:00,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:00,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:01:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:00,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:01,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:01,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:01:01,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:01,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:01:01,213 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:01:01,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:01:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:01,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864613998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:01,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:01,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-15 16:01:01,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013527546] [2022-03-15 16:01:01,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:01,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:01:01,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:01:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:01:01,223 INFO L87 Difference]: Start difference. First operand 371 states and 1114 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:03,061 INFO L93 Difference]: Finished difference Result 1013 states and 2850 transitions. [2022-03-15 16:01:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:01:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:01:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:03,063 INFO L225 Difference]: With dead ends: 1013 [2022-03-15 16:01:03,063 INFO L226 Difference]: Without dead ends: 995 [2022-03-15 16:01:03,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=556, Invalid=2636, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:01:03,064 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 220 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:03,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 494 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1197 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-03-15 16:01:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-15 16:01:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 374. [2022-03-15 16:01:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.013404825737265) internal successors, (1124), 373 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1124 transitions. [2022-03-15 16:01:03,070 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1124 transitions. Word has length 22 [2022-03-15 16:01:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:03,070 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1124 transitions. [2022-03-15 16:01:03,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1124 transitions. [2022-03-15 16:01:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:01:03,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:03,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:03,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:03,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-15 16:01:03,271 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1939747083, now seen corresponding path program 210 times [2022-03-15 16:01:03,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:03,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377725655] [2022-03-15 16:01:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:03,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:03,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377725655] [2022-03-15 16:01:03,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377725655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:03,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023748300] [2022-03-15 16:01:03,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:03,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:03,405 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:03,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-15 16:01:03,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:01:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:01:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:03,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:03,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:01:03,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:03,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 16:01:03,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:03,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:01:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:04,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:04,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:04,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 16:01:04,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:04,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:01:04,250 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:01:04,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:01:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:04,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023748300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:04,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:04,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-15 16:01:04,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912359524] [2022-03-15 16:01:04,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:04,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:01:04,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:01:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:01:04,270 INFO L87 Difference]: Start difference. First operand 374 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:04,753 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2022-03-15 16:01:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:01:04,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:01:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:04,754 INFO L225 Difference]: With dead ends: 517 [2022-03-15 16:01:04,754 INFO L226 Difference]: Without dead ends: 507 [2022-03-15 16:01:04,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:01:04,755 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:04,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 204 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 590 Invalid, 0 Unknown, 214 Unchecked, 0.2s Time] [2022-03-15 16:01:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-15 16:01:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 390. [2022-03-15 16:01:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9974293059125965) internal successors, (1166), 389 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1166 transitions. [2022-03-15 16:01:04,759 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1166 transitions. Word has length 22 [2022-03-15 16:01:04,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:04,759 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1166 transitions. [2022-03-15 16:01:04,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1166 transitions. [2022-03-15 16:01:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:01:04,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:04,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:04,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:04,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:04,960 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash 774448297, now seen corresponding path program 211 times [2022-03-15 16:01:04,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:04,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786308154] [2022-03-15 16:01:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:04,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:05,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:05,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786308154] [2022-03-15 16:01:05,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786308154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:05,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257324861] [2022-03-15 16:01:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:05,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:05,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:05,088 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:05,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-15 16:01:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:01:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:05,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:05,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:01:05,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:05,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-15 16:01:05,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:05,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:01:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:05,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:05,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:05,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:01:05,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:05,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:01:05,945 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:01:05,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:01:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:05,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257324861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:05,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:05,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-15 16:01:05,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993587100] [2022-03-15 16:01:05,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:05,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:01:05,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:01:05,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:01:05,973 INFO L87 Difference]: Start difference. First operand 390 states and 1166 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:07,109 INFO L93 Difference]: Finished difference Result 810 states and 2278 transitions. [2022-03-15 16:01:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:01:07,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:01:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:07,111 INFO L225 Difference]: With dead ends: 810 [2022-03-15 16:01:07,111 INFO L226 Difference]: Without dead ends: 736 [2022-03-15 16:01:07,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:01:07,111 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 194 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:07,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 371 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 902 Invalid, 0 Unknown, 273 Unchecked, 0.4s Time] [2022-03-15 16:01:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-15 16:01:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 400. [2022-03-15 16:01:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.025062656641604) internal successors, (1207), 399 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1207 transitions. [2022-03-15 16:01:07,116 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1207 transitions. Word has length 22 [2022-03-15 16:01:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:07,117 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1207 transitions. [2022-03-15 16:01:07,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1207 transitions. [2022-03-15 16:01:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:01:07,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:07,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:07,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-15 16:01:07,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:07,318 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 952192629, now seen corresponding path program 212 times [2022-03-15 16:01:07,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:07,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701523792] [2022-03-15 16:01:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:07,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:07,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:07,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701523792] [2022-03-15 16:01:07,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701523792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:07,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803299322] [2022-03-15 16:01:07,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:07,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:07,462 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:07,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-15 16:01:07,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:07,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:01:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:07,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:07,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-15 16:01:08,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:08,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-15 16:01:08,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:08,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-15 16:01:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:08,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:08,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:08,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:01:08,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:08,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:01:08,418 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:01:08,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:01:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:08,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803299322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:08,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:08,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-15 16:01:08,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016018077] [2022-03-15 16:01:08,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:08,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:01:08,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:08,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:01:08,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:01:08,428 INFO L87 Difference]: Start difference. First operand 400 states and 1207 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:08,852 INFO L93 Difference]: Finished difference Result 479 states and 1428 transitions. [2022-03-15 16:01:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:01:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:01:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:08,853 INFO L225 Difference]: With dead ends: 479 [2022-03-15 16:01:08,853 INFO L226 Difference]: Without dead ends: 470 [2022-03-15 16:01:08,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:01:08,854 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:08,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 173 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 261 Unchecked, 0.2s Time] [2022-03-15 16:01:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-15 16:01:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 399. [2022-03-15 16:01:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0251256281407035) internal successors, (1204), 398 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1204 transitions. [2022-03-15 16:01:08,858 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1204 transitions. Word has length 22 [2022-03-15 16:01:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:08,858 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1204 transitions. [2022-03-15 16:01:08,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1204 transitions. [2022-03-15 16:01:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:01:08,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:08,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:08,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-15 16:01:09,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2022-03-15 16:01:09,060 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1968961355, now seen corresponding path program 213 times [2022-03-15 16:01:09,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:09,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755915683] [2022-03-15 16:01:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:09,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:09,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755915683] [2022-03-15 16:01:09,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755915683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:09,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221070526] [2022-03-15 16:01:09,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:09,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:09,149 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-15 16:01:09,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:01:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:01:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:09,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:09,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-15 16:01:09,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:09,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-03-15 16:01:09,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-15 16:01:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:09,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:09,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:09,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-15 16:01:09,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:09,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:01:09,980 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:01:09,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:01:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:09,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221070526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:09,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:09,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-15 16:01:09,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496112270] [2022-03-15 16:01:09,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:09,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:01:09,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:09,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:01:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:01:09,992 INFO L87 Difference]: Start difference. First operand 399 states and 1204 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:10,464 INFO L93 Difference]: Finished difference Result 704 states and 2032 transitions. [2022-03-15 16:01:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:01:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:01:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:10,465 INFO L225 Difference]: With dead ends: 704 [2022-03-15 16:01:10,465 INFO L226 Difference]: Without dead ends: 565 [2022-03-15 16:01:10,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:01:10,465 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 155 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:10,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 199 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 761 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2022-03-15 16:01:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-15 16:01:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 370. [2022-03-15 16:01:10,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.978319783197832) internal successors, (1099), 369 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1099 transitions. [2022-03-15 16:01:10,470 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1099 transitions. Word has length 22 [2022-03-15 16:01:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:10,470 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1099 transitions. [2022-03-15 16:01:10,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1099 transitions. [2022-03-15 16:01:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:01:10,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:10,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:10,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:10,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:10,671 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash -391539511, now seen corresponding path program 214 times [2022-03-15 16:01:10,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:10,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506457647] [2022-03-15 16:01:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:10,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:10,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506457647] [2022-03-15 16:01:10,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506457647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:10,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033653948] [2022-03-15 16:01:10,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:10,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:10,764 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:10,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-15 16:01:10,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:10,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:01:10,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:11,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:11,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-15 16:01:11,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:11,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:01:11,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:11,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:01:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:11,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:11,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:11,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-15 16:01:11,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:11,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:01:11,508 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:01:11,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:01:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:11,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033653948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:11,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:11,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2022-03-15 16:01:11,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301419188] [2022-03-15 16:01:11,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:11,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:01:11,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:01:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:01:11,519 INFO L87 Difference]: Start difference. First operand 370 states and 1099 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:11,965 INFO L93 Difference]: Finished difference Result 748 states and 2195 transitions. [2022-03-15 16:01:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:01:11,966 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:01:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:11,967 INFO L225 Difference]: With dead ends: 748 [2022-03-15 16:01:11,967 INFO L226 Difference]: Without dead ends: 619 [2022-03-15 16:01:11,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:01:11,967 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:11,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 269 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 617 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-03-15 16:01:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-15 16:01:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 372. [2022-03-15 16:01:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9784366576819408) internal successors, (1105), 371 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1105 transitions. [2022-03-15 16:01:11,972 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1105 transitions. Word has length 22 [2022-03-15 16:01:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:11,972 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1105 transitions. [2022-03-15 16:01:11,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1105 transitions. [2022-03-15 16:01:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:01:11,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:11,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:11,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:12,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:12,174 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:12,174 INFO L85 PathProgramCache]: Analyzing trace with hash -946201253, now seen corresponding path program 215 times [2022-03-15 16:01:12,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:12,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520871180] [2022-03-15 16:01:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:12,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:12,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:12,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520871180] [2022-03-15 16:01:12,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520871180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:12,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830578886] [2022-03-15 16:01:12,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:12,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:12,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:12,277 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:12,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-15 16:01:12,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:12,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:01:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:12,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:01:12,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:12,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-15 16:01:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:12,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:12,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:12,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-15 16:01:12,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:01:12,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 16:01:12,929 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 16:01:12,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 16:01:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:12,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830578886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:12,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:12,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-15 16:01:12,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523324254] [2022-03-15 16:01:12,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:12,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:01:12,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:01:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:01:12,938 INFO L87 Difference]: Start difference. First operand 372 states and 1105 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:13,660 INFO L93 Difference]: Finished difference Result 599 states and 1743 transitions. [2022-03-15 16:01:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:01:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:01:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:13,661 INFO L225 Difference]: With dead ends: 599 [2022-03-15 16:01:13,661 INFO L226 Difference]: Without dead ends: 478 [2022-03-15 16:01:13,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:01:13,661 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:13,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 292 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:01:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-15 16:01:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2022-03-15 16:01:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-15 16:01:13,665 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-15 16:01:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:13,665 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-15 16:01:13,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-15 16:01:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:13,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:13,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:13,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:13,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-03-15 16:01:13,866 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2020815505, now seen corresponding path program 216 times [2022-03-15 16:01:13,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:13,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554711056] [2022-03-15 16:01:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:14,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:14,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554711056] [2022-03-15 16:01:14,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554711056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:14,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402131226] [2022-03-15 16:01:14,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:14,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:14,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:14,088 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:14,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-15 16:01:14,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:01:14,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:14,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:14,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:14,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-03-15 16:01:14,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:01:14,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:14,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:01:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:15,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:15,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-15 16:01:15,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:15,625 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:15,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-03-15 16:01:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:15,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402131226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:15,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:15,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-15 16:01:15,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338282735] [2022-03-15 16:01:15,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:01:15,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:01:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:01:15,733 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:16,893 INFO L93 Difference]: Finished difference Result 592 states and 1853 transitions. [2022-03-15 16:01:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:01:16,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:16,895 INFO L225 Difference]: With dead ends: 592 [2022-03-15 16:01:16,895 INFO L226 Difference]: Without dead ends: 553 [2022-03-15 16:01:16,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:01:16,895 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 176 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:16,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 329 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 780 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-03-15 16:01:16,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-15 16:01:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 335. [2022-03-15 16:01:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.05688622754491) internal successors, (1021), 334 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1021 transitions. [2022-03-15 16:01:16,899 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1021 transitions. Word has length 23 [2022-03-15 16:01:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:16,899 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1021 transitions. [2022-03-15 16:01:16,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1021 transitions. [2022-03-15 16:01:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:16,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:16,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:16,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-15 16:01:17,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-15 16:01:17,100 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -239067473, now seen corresponding path program 217 times [2022-03-15 16:01:17,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:17,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452794152] [2022-03-15 16:01:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:17,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:17,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:17,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452794152] [2022-03-15 16:01:17,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452794152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:17,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764889193] [2022-03-15 16:01:17,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:17,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:17,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:17,256 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:17,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-15 16:01:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:17,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:01:18,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:01:18,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:18,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-03-15 16:01:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:18,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:18,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:19,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-03-15 16:01:19,257 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:19,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-03-15 16:01:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:19,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764889193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:19,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:19,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:01:19,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027428719] [2022-03-15 16:01:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:19,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:01:19,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:01:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:01:19,399 INFO L87 Difference]: Start difference. First operand 335 states and 1021 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:20,303 INFO L93 Difference]: Finished difference Result 675 states and 2100 transitions. [2022-03-15 16:01:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:01:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:20,304 INFO L225 Difference]: With dead ends: 675 [2022-03-15 16:01:20,304 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 16:01:20,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:01:20,305 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 313 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:20,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 246 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 685 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-03-15 16:01:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 16:01:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 370. [2022-03-15 16:01:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.151761517615176) internal successors, (1163), 369 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1163 transitions. [2022-03-15 16:01:20,309 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1163 transitions. Word has length 23 [2022-03-15 16:01:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:20,309 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1163 transitions. [2022-03-15 16:01:20,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1163 transitions. [2022-03-15 16:01:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:20,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:20,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:20,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-15 16:01:20,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-15 16:01:20,510 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:20,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1703477295, now seen corresponding path program 218 times [2022-03-15 16:01:20,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:20,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567279314] [2022-03-15 16:01:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:20,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:20,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:20,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567279314] [2022-03-15 16:01:20,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567279314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:20,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676917300] [2022-03-15 16:01:20,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:20,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:20,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:20,658 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:20,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-15 16:01:20,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:20,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:20,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2022-03-15 16:01:21,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:01:21,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:21,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:01:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:21,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:21,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-03-15 16:01:22,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:22,174 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:22,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-03-15 16:01:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:22,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676917300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:22,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:22,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:01:22,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410739680] [2022-03-15 16:01:22,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:22,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:01:22,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:01:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:01:22,294 INFO L87 Difference]: Start difference. First operand 370 states and 1163 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:24,078 INFO L93 Difference]: Finished difference Result 913 states and 2825 transitions. [2022-03-15 16:01:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:01:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:24,080 INFO L225 Difference]: With dead ends: 913 [2022-03-15 16:01:24,080 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 16:01:24,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:01:24,080 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 190 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 937 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:24,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 626 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1547 Invalid, 0 Unknown, 937 Unchecked, 0.6s Time] [2022-03-15 16:01:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 16:01:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 417. [2022-03-15 16:01:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.2764423076923075) internal successors, (1363), 416 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1363 transitions. [2022-03-15 16:01:24,086 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1363 transitions. Word has length 23 [2022-03-15 16:01:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:24,086 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1363 transitions. [2022-03-15 16:01:24,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1363 transitions. [2022-03-15 16:01:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:24,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:24,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:24,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-15 16:01:24,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:24,288 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -574340681, now seen corresponding path program 219 times [2022-03-15 16:01:24,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:24,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411788805] [2022-03-15 16:01:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:24,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:24,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411788805] [2022-03-15 16:01:24,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411788805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:24,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512419567] [2022-03-15 16:01:24,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:24,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:24,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:24,426 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:24,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-15 16:01:24,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:01:24,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:24,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:24,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2022-03-15 16:01:25,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:25,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-15 16:01:25,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 165 [2022-03-15 16:01:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:25,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:25,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:01:26,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:26,109 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:26,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-03-15 16:01:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:26,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512419567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:26,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:26,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:01:26,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794275641] [2022-03-15 16:01:26,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:26,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:01:26,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:01:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:01:26,186 INFO L87 Difference]: Start difference. First operand 417 states and 1363 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:28,750 INFO L93 Difference]: Finished difference Result 873 states and 2755 transitions. [2022-03-15 16:01:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:01:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:28,752 INFO L225 Difference]: With dead ends: 873 [2022-03-15 16:01:28,752 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 16:01:28,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=591, Invalid=5109, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:01:28,753 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 168 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:28,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 587 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1477 Invalid, 0 Unknown, 682 Unchecked, 0.6s Time] [2022-03-15 16:01:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 16:01:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 415. [2022-03-15 16:01:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.285024154589372) internal successors, (1360), 414 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1360 transitions. [2022-03-15 16:01:28,758 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1360 transitions. Word has length 23 [2022-03-15 16:01:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:28,759 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1360 transitions. [2022-03-15 16:01:28,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1360 transitions. [2022-03-15 16:01:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:28,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:28,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:28,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-15 16:01:28,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-03-15 16:01:28,960 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 722270827, now seen corresponding path program 220 times [2022-03-15 16:01:28,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:28,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240484566] [2022-03-15 16:01:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:29,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:29,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240484566] [2022-03-15 16:01:29,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240484566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:29,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629494787] [2022-03-15 16:01:29,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:29,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:29,090 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:29,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-15 16:01:29,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:29,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:29,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:29,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 152 [2022-03-15 16:01:29,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-15 16:01:29,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:29,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 16:01:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:30,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:30,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:01:30,712 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:30,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 286 [2022-03-15 16:01:30,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 232 [2022-03-15 16:01:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:30,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629494787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:30,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:30,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:01:30,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312922241] [2022-03-15 16:01:30,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:30,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:01:30,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:01:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:01:30,902 INFO L87 Difference]: Start difference. First operand 415 states and 1360 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:32,755 INFO L93 Difference]: Finished difference Result 912 states and 2965 transitions. [2022-03-15 16:01:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:01:32,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:32,757 INFO L225 Difference]: With dead ends: 912 [2022-03-15 16:01:32,757 INFO L226 Difference]: Without dead ends: 835 [2022-03-15 16:01:32,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=458, Invalid=3574, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:01:32,758 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 175 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:32,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 671 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1133 Invalid, 0 Unknown, 561 Unchecked, 0.5s Time] [2022-03-15 16:01:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-15 16:01:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 432. [2022-03-15 16:01:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.3387470997679816) internal successors, (1439), 431 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1439 transitions. [2022-03-15 16:01:32,772 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1439 transitions. Word has length 23 [2022-03-15 16:01:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:32,772 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1439 transitions. [2022-03-15 16:01:32,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1439 transitions. [2022-03-15 16:01:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:32,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:32,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:32,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-15 16:01:32,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:32,973 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1011545183, now seen corresponding path program 221 times [2022-03-15 16:01:32,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:32,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109318311] [2022-03-15 16:01:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:32,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:33,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:33,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109318311] [2022-03-15 16:01:33,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109318311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:33,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504298876] [2022-03-15 16:01:33,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:33,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:33,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:33,098 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:33,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-15 16:01:33,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:01:33,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:01:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:33,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-03-15 16:01:34,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-15 16:01:34,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:34,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2022-03-15 16:01:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:34,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:34,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 276 [2022-03-15 16:01:35,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-03-15 16:01:35,390 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:35,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-03-15 16:01:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:35,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504298876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:35,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:35,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:01:35,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86191896] [2022-03-15 16:01:35,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:35,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:01:35,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:35,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:01:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:01:35,552 INFO L87 Difference]: Start difference. First operand 432 states and 1439 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:36,679 INFO L93 Difference]: Finished difference Result 1224 states and 3958 transitions. [2022-03-15 16:01:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:01:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:36,681 INFO L225 Difference]: With dead ends: 1224 [2022-03-15 16:01:36,681 INFO L226 Difference]: Without dead ends: 1072 [2022-03-15 16:01:36,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:01:36,682 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 388 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:36,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 395 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1042 Invalid, 0 Unknown, 361 Unchecked, 0.4s Time] [2022-03-15 16:01:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-03-15 16:01:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 490. [2022-03-15 16:01:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.539877300613497) internal successors, (1731), 489 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1731 transitions. [2022-03-15 16:01:36,689 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1731 transitions. Word has length 23 [2022-03-15 16:01:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:36,689 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1731 transitions. [2022-03-15 16:01:36,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1731 transitions. [2022-03-15 16:01:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:36,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:36,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:36,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-15 16:01:36,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-15 16:01:36,890 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:36,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1523369173, now seen corresponding path program 222 times [2022-03-15 16:01:36,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:36,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396856052] [2022-03-15 16:01:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:36,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:37,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:37,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396856052] [2022-03-15 16:01:37,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396856052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:37,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361683893] [2022-03-15 16:01:37,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:37,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:37,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:37,009 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:37,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-15 16:01:37,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:01:37,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:37,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-03-15 16:01:37,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:01:37,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:37,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:01:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:38,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:38,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:38,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-03-15 16:01:38,710 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:38,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2022-03-15 16:01:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:38,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361683893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:38,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:38,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:01:38,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082246448] [2022-03-15 16:01:38,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:38,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:01:38,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:01:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:01:38,886 INFO L87 Difference]: Start difference. First operand 490 states and 1731 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:39,544 INFO L93 Difference]: Finished difference Result 792 states and 2642 transitions. [2022-03-15 16:01:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:01:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:39,546 INFO L225 Difference]: With dead ends: 792 [2022-03-15 16:01:39,546 INFO L226 Difference]: Without dead ends: 745 [2022-03-15 16:01:39,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:01:39,546 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:39,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 321 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 701 Invalid, 0 Unknown, 303 Unchecked, 0.3s Time] [2022-03-15 16:01:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-03-15 16:01:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 511. [2022-03-15 16:01:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.5313725490196077) internal successors, (1801), 510 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1801 transitions. [2022-03-15 16:01:39,552 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1801 transitions. Word has length 23 [2022-03-15 16:01:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:39,553 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1801 transitions. [2022-03-15 16:01:39,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1801 transitions. [2022-03-15 16:01:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:39,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:39,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:39,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-15 16:01:39,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:39,754 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash -57402743, now seen corresponding path program 223 times [2022-03-15 16:01:39,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:39,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585889670] [2022-03-15 16:01:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:39,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:39,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:39,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585889670] [2022-03-15 16:01:39,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585889670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:39,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53870830] [2022-03-15 16:01:39,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:01:39,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:39,936 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:39,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-15 16:01:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:40,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:40,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:01:40,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:40,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 189 [2022-03-15 16:01:40,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2022-03-15 16:01:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:41,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:41,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-15 16:01:41,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-03-15 16:01:41,902 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:41,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 183 [2022-03-15 16:01:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:42,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53870830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:42,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:42,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:01:42,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021874881] [2022-03-15 16:01:42,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:42,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:01:42,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:01:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:01:42,116 INFO L87 Difference]: Start difference. First operand 511 states and 1801 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:43,923 INFO L93 Difference]: Finished difference Result 1082 states and 3617 transitions. [2022-03-15 16:01:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:01:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:43,925 INFO L225 Difference]: With dead ends: 1082 [2022-03-15 16:01:43,925 INFO L226 Difference]: Without dead ends: 952 [2022-03-15 16:01:43,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:01:43,926 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 201 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:43,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 600 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1603 Invalid, 0 Unknown, 179 Unchecked, 0.6s Time] [2022-03-15 16:01:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-03-15 16:01:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 570. [2022-03-15 16:01:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.6045694200351495) internal successors, (2051), 569 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 2051 transitions. [2022-03-15 16:01:43,934 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 2051 transitions. Word has length 23 [2022-03-15 16:01:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:43,934 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 2051 transitions. [2022-03-15 16:01:43,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 2051 transitions. [2022-03-15 16:01:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:43,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:43,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:43,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:44,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:44,159 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:44,159 INFO L85 PathProgramCache]: Analyzing trace with hash -192457175, now seen corresponding path program 224 times [2022-03-15 16:01:44,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:44,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676940157] [2022-03-15 16:01:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:44,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:44,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:44,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676940157] [2022-03-15 16:01:44,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676940157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:44,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122776021] [2022-03-15 16:01:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:01:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:44,299 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:44,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-15 16:01:44,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:44,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:01:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:44,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 237 [2022-03-15 16:01:45,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:01:45,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:45,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:01:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:45,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:45,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 373 treesize of output 333 [2022-03-15 16:01:46,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 272 [2022-03-15 16:01:46,573 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:46,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 240 [2022-03-15 16:01:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:46,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122776021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:46,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:46,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:01:46,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453538635] [2022-03-15 16:01:46,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:46,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:01:46,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:46,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:01:46,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:01:46,764 INFO L87 Difference]: Start difference. First operand 570 states and 2051 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:49,565 INFO L93 Difference]: Finished difference Result 1528 states and 4828 transitions. [2022-03-15 16:01:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:01:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:49,567 INFO L225 Difference]: With dead ends: 1528 [2022-03-15 16:01:49,567 INFO L226 Difference]: Without dead ends: 1133 [2022-03-15 16:01:49,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=568, Invalid=6074, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:01:49,568 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 289 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:49,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 862 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2035 Invalid, 0 Unknown, 366 Unchecked, 0.8s Time] [2022-03-15 16:01:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-15 16:01:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 648. [2022-03-15 16:01:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-03-15 16:01:49,577 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-03-15 16:01:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-03-15 16:01:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-03-15 16:01:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:49,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:49,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:49,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-15 16:01:49,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:49,779 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:49,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1898578769, now seen corresponding path program 225 times [2022-03-15 16:01:49,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:49,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833848673] [2022-03-15 16:01:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:49,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:49,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833848673] [2022-03-15 16:01:49,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833848673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:49,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632414124] [2022-03-15 16:01:49,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:01:49,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:49,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:49,896 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:49,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-15 16:01:50,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:01:50,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:50,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:50,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:50,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-03-15 16:01:50,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:50,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-03-15 16:01:50,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-15 16:01:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:50,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:51,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:51,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-03-15 16:01:51,511 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:51,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-03-15 16:01:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:51,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632414124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:51,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:51,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:01:51,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354621710] [2022-03-15 16:01:51,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:51,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:01:51,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:01:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:01:51,693 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:52,120 INFO L93 Difference]: Finished difference Result 829 states and 2815 transitions. [2022-03-15 16:01:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:01:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:52,122 INFO L225 Difference]: With dead ends: 829 [2022-03-15 16:01:52,122 INFO L226 Difference]: Without dead ends: 793 [2022-03-15 16:01:52,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:01:52,123 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:52,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 264 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 688 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-03-15 16:01:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-15 16:01:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 648. [2022-03-15 16:01:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-03-15 16:01:52,131 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-03-15 16:01:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:52,131 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-03-15 16:01:52,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-03-15 16:01:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:52,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:52,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:52,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-03-15 16:01:52,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-03-15 16:01:52,347 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash 637099387, now seen corresponding path program 226 times [2022-03-15 16:01:52,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:52,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887936117] [2022-03-15 16:01:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:52,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:52,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:52,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887936117] [2022-03-15 16:01:52,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887936117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:52,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643221406] [2022-03-15 16:01:52,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:01:52,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:52,458 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:52,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-15 16:01:52,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:01:52,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:52,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:52,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:52,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:01:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:53,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 244 [2022-03-15 16:01:53,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 192 [2022-03-15 16:01:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:53,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:53,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:54,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 239 [2022-03-15 16:01:54,406 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:54,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 211 [2022-03-15 16:01:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:54,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643221406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:54,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:54,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:01:54,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223802997] [2022-03-15 16:01:54,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:54,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:01:54,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:01:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:01:54,598 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:55,016 INFO L93 Difference]: Finished difference Result 838 states and 2843 transitions. [2022-03-15 16:01:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:01:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:55,018 INFO L225 Difference]: With dead ends: 838 [2022-03-15 16:01:55,018 INFO L226 Difference]: Without dead ends: 809 [2022-03-15 16:01:55,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:01:55,018 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 169 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:55,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 272 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 683 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-15 16:01:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-15 16:01:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 648. [2022-03-15 16:01:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-03-15 16:01:55,027 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-03-15 16:01:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:55,028 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-03-15 16:01:55,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-03-15 16:01:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:55,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:55,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:55,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-03-15 16:01:55,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-15 16:01:55,230 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash 882528537, now seen corresponding path program 227 times [2022-03-15 16:01:55,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:55,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586066087] [2022-03-15 16:01:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:01:55,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:55,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586066087] [2022-03-15 16:01:55,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586066087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:55,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620047767] [2022-03-15 16:01:55,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:01:55,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:55,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:55,376 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:55,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-15 16:01:55,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:01:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:55,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-03-15 16:01:56,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:01:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:56,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:01:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:56,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:01:56,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:01:57,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 245 [2022-03-15 16:01:57,070 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:01:57,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 215 [2022-03-15 16:01:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:01:57,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620047767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:01:57,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:01:57,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:01:57,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318717253] [2022-03-15 16:01:57,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:01:57,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:01:57,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:01:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:01:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:01:57,261 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:01:58,528 INFO L93 Difference]: Finished difference Result 1325 states and 4137 transitions. [2022-03-15 16:01:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:01:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:01:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:01:58,530 INFO L225 Difference]: With dead ends: 1325 [2022-03-15 16:01:58,530 INFO L226 Difference]: Without dead ends: 1184 [2022-03-15 16:01:58,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:01:58,531 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 220 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:01:58,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 527 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1150 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-03-15 16:01:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-03-15 16:01:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 702. [2022-03-15 16:01:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.470756062767475) internal successors, (2433), 701 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2433 transitions. [2022-03-15 16:01:58,541 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2433 transitions. Word has length 23 [2022-03-15 16:01:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:01:58,541 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2433 transitions. [2022-03-15 16:01:58,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:01:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2433 transitions. [2022-03-15 16:01:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:01:58,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:01:58,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:01:58,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-15 16:01:58,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-15 16:01:58,743 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:01:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:01:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1725232039, now seen corresponding path program 228 times [2022-03-15 16:01:58,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:01:58,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629508165] [2022-03-15 16:01:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:01:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:01:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:01:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:01:58,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:01:58,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629508165] [2022-03-15 16:01:58,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629508165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:01:58,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779563169] [2022-03-15 16:01:58,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:01:58,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:01:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:01:58,970 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:01:58,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-15 16:01:59,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:01:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:01:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:01:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:01:59,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-03-15 16:01:59,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:01:59,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:01:59,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2022-03-15 16:02:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:00,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:00,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:02:00,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-15 16:02:00,830 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:00,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-03-15 16:02:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:01,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779563169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:01,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:01,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:02:01,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920404670] [2022-03-15 16:02:01,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:01,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:02:01,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:01,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:02:01,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:02:01,031 INFO L87 Difference]: Start difference. First operand 702 states and 2433 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:05,280 INFO L93 Difference]: Finished difference Result 1518 states and 4983 transitions. [2022-03-15 16:02:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 16:02:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:05,283 INFO L225 Difference]: With dead ends: 1518 [2022-03-15 16:02:05,283 INFO L226 Difference]: Without dead ends: 1411 [2022-03-15 16:02:05,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=873, Invalid=6959, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 16:02:05,284 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 246 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:05,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 689 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1953 Invalid, 0 Unknown, 522 Unchecked, 0.8s Time] [2022-03-15 16:02:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-03-15 16:02:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 699. [2022-03-15 16:02:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.4656160458452723) internal successors, (2419), 698 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2419 transitions. [2022-03-15 16:02:05,294 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2419 transitions. Word has length 23 [2022-03-15 16:02:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2419 transitions. [2022-03-15 16:02:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2419 transitions. [2022-03-15 16:02:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:05,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:05,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:05,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-15 16:02:05,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:05,495 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash -150983109, now seen corresponding path program 229 times [2022-03-15 16:02:05,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:05,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005354413] [2022-03-15 16:02:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:05,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:05,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:05,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005354413] [2022-03-15 16:02:05,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005354413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:05,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694438232] [2022-03-15 16:02:05,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:02:05,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:05,651 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:05,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-15 16:02:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:05,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 201 [2022-03-15 16:02:06,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-03-15 16:02:06,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:06,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-03-15 16:02:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:06,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:07,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 246 [2022-03-15 16:02:07,632 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:07,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-15 16:02:07,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:02:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:07,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694438232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:07,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:07,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:02:07,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041896308] [2022-03-15 16:02:07,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:07,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:07,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:07,788 INFO L87 Difference]: Start difference. First operand 699 states and 2419 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:09,011 INFO L93 Difference]: Finished difference Result 1114 states and 3636 transitions. [2022-03-15 16:02:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:02:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:09,014 INFO L225 Difference]: With dead ends: 1114 [2022-03-15 16:02:09,014 INFO L226 Difference]: Without dead ends: 1016 [2022-03-15 16:02:09,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:02:09,014 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:09,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 601 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1267 Invalid, 0 Unknown, 541 Unchecked, 0.5s Time] [2022-03-15 16:02:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-03-15 16:02:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 705. [2022-03-15 16:02:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.4744318181818183) internal successors, (2446), 704 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2446 transitions. [2022-03-15 16:02:09,022 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2446 transitions. Word has length 23 [2022-03-15 16:02:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:09,022 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2446 transitions. [2022-03-15 16:02:09,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2446 transitions. [2022-03-15 16:02:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:09,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:09,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:09,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-15 16:02:09,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-03-15 16:02:09,224 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:09,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash -97398047, now seen corresponding path program 230 times [2022-03-15 16:02:09,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:09,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021889633] [2022-03-15 16:02:09,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:09,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:09,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:09,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021889633] [2022-03-15 16:02:09,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021889633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:09,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273144877] [2022-03-15 16:02:09,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:02:09,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:09,364 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:09,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-15 16:02:09,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:09,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:09,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-03-15 16:02:10,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:02:10,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:10,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:02:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:10,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:10,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-15 16:02:11,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-03-15 16:02:11,022 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:11,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-03-15 16:02:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:11,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273144877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:11,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:11,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:02:11,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108643027] [2022-03-15 16:02:11,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:11,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:02:11,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:11,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:02:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:02:11,187 INFO L87 Difference]: Start difference. First operand 705 states and 2446 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:11,396 INFO L93 Difference]: Finished difference Result 890 states and 2974 transitions. [2022-03-15 16:02:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:02:11,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:11,398 INFO L225 Difference]: With dead ends: 890 [2022-03-15 16:02:11,398 INFO L226 Difference]: Without dead ends: 843 [2022-03-15 16:02:11,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:11,398 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:11,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 222 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 451 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-03-15 16:02:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-03-15 16:02:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 734. [2022-03-15 16:02:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.442019099590723) internal successors, (2523), 733 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2523 transitions. [2022-03-15 16:02:11,406 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2523 transitions. Word has length 23 [2022-03-15 16:02:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:11,406 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2523 transitions. [2022-03-15 16:02:11,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:11,406 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2523 transitions. [2022-03-15 16:02:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:11,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:11,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:11,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-15 16:02:11,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-03-15 16:02:11,607 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2125767515, now seen corresponding path program 231 times [2022-03-15 16:02:11,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:11,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767886054] [2022-03-15 16:02:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:11,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:11,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:11,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767886054] [2022-03-15 16:02:11,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767886054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:11,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100588280] [2022-03-15 16:02:11,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:02:11,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:11,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:11,715 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:11,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-15 16:02:11,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:02:11,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:11,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:11,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:12,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:02:12,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:12,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-03-15 16:02:12,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-03-15 16:02:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:13,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:13,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-15 16:02:13,744 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:13,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-15 16:02:13,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:02:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:13,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100588280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:13,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:13,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:02:13,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498938182] [2022-03-15 16:02:13,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:13,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:02:13,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:02:13,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:02:13,913 INFO L87 Difference]: Start difference. First operand 734 states and 2523 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:14,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:14,830 INFO L93 Difference]: Finished difference Result 1070 states and 3557 transitions. [2022-03-15 16:02:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:02:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:14,832 INFO L225 Difference]: With dead ends: 1070 [2022-03-15 16:02:14,832 INFO L226 Difference]: Without dead ends: 995 [2022-03-15 16:02:14,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:02:14,833 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 161 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:14,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 431 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 761 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2022-03-15 16:02:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-15 16:02:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 727. [2022-03-15 16:02:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.43801652892562) internal successors, (2496), 726 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2496 transitions. [2022-03-15 16:02:14,842 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2496 transitions. Word has length 23 [2022-03-15 16:02:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:14,842 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 2496 transitions. [2022-03-15 16:02:14,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2496 transitions. [2022-03-15 16:02:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:14,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:14,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:14,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-15 16:02:15,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-15 16:02:15,044 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1890464561, now seen corresponding path program 232 times [2022-03-15 16:02:15,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:15,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010969376] [2022-03-15 16:02:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:15,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:15,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:15,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010969376] [2022-03-15 16:02:15,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010969376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:15,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249510785] [2022-03-15 16:02:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:02:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:15,249 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:15,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-15 16:02:15,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:02:15,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:15,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:02:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:15,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-15 16:02:16,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 189 [2022-03-15 16:02:16,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:16,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 184 [2022-03-15 16:02:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:16,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:17,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 285 [2022-03-15 16:02:17,577 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:17,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 273 [2022-03-15 16:02:17,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 236 [2022-03-15 16:02:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:17,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249510785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:17,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:17,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:02:17,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668243974] [2022-03-15 16:02:17,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:17,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:02:17,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:17,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:02:17,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:02:17,756 INFO L87 Difference]: Start difference. First operand 727 states and 2496 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:20,754 INFO L93 Difference]: Finished difference Result 1434 states and 4529 transitions. [2022-03-15 16:02:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:02:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:20,756 INFO L225 Difference]: With dead ends: 1434 [2022-03-15 16:02:20,757 INFO L226 Difference]: Without dead ends: 1281 [2022-03-15 16:02:20,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=576, Invalid=5904, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:02:20,757 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 209 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:20,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 945 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2275 Invalid, 0 Unknown, 363 Unchecked, 0.9s Time] [2022-03-15 16:02:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-03-15 16:02:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 776. [2022-03-15 16:02:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.5006451612903224) internal successors, (2713), 775 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2713 transitions. [2022-03-15 16:02:20,768 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2713 transitions. Word has length 23 [2022-03-15 16:02:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:20,768 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2713 transitions. [2022-03-15 16:02:20,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2713 transitions. [2022-03-15 16:02:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:20,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:20,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:20,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:20,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:20,970 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1393962373, now seen corresponding path program 233 times [2022-03-15 16:02:20,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:20,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628362929] [2022-03-15 16:02:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:21,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:21,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628362929] [2022-03-15 16:02:21,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628362929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:21,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333039998] [2022-03-15 16:02:21,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:02:21,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:21,061 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:21,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-15 16:02:21,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:21,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:21,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:02:22,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:22,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 239 [2022-03-15 16:02:22,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 181 [2022-03-15 16:02:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:22,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:22,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-03-15 16:02:22,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-15 16:02:22,805 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:22,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-03-15 16:02:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:22,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333039998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:22,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:22,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:02:22,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618875622] [2022-03-15 16:02:22,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:22,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:02:22,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:02:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:02:22,976 INFO L87 Difference]: Start difference. First operand 776 states and 2713 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:23,126 INFO L93 Difference]: Finished difference Result 988 states and 3328 transitions. [2022-03-15 16:02:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:02:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:23,128 INFO L225 Difference]: With dead ends: 988 [2022-03-15 16:02:23,128 INFO L226 Difference]: Without dead ends: 941 [2022-03-15 16:02:23,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:23,129 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:23,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 185 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-03-15 16:02:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-15 16:02:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 830. [2022-03-15 16:02:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4632086851628467) internal successors, (2871), 829 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2871 transitions. [2022-03-15 16:02:23,138 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2871 transitions. Word has length 23 [2022-03-15 16:02:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:23,138 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2871 transitions. [2022-03-15 16:02:23,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2871 transitions. [2022-03-15 16:02:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:23,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:23,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:23,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-15 16:02:23,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:23,339 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1089657063, now seen corresponding path program 234 times [2022-03-15 16:02:23,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:23,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200778031] [2022-03-15 16:02:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:23,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:23,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:23,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200778031] [2022-03-15 16:02:23,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200778031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:23,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046226965] [2022-03-15 16:02:23,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:02:23,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:23,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:23,492 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:23,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-15 16:02:23,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:02:23,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:23,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 211 [2022-03-15 16:02:24,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:02:24,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:24,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:02:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:24,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:24,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-15 16:02:25,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 281 [2022-03-15 16:02:25,374 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:25,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 249 [2022-03-15 16:02:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:25,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046226965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:25,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:25,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:02:25,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938626336] [2022-03-15 16:02:25,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:25,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:02:25,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:02:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:25,606 INFO L87 Difference]: Start difference. First operand 830 states and 2871 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:26,715 INFO L93 Difference]: Finished difference Result 1611 states and 5560 transitions. [2022-03-15 16:02:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:02:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:26,718 INFO L225 Difference]: With dead ends: 1611 [2022-03-15 16:02:26,718 INFO L226 Difference]: Without dead ends: 1493 [2022-03-15 16:02:26,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=2184, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:02:26,718 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 149 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:26,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 716 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1262 Invalid, 0 Unknown, 414 Unchecked, 0.5s Time] [2022-03-15 16:02:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-03-15 16:02:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 875. [2022-03-15 16:02:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4393592677345537) internal successors, (3006), 874 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3006 transitions. [2022-03-15 16:02:26,730 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3006 transitions. Word has length 23 [2022-03-15 16:02:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:26,731 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 3006 transitions. [2022-03-15 16:02:26,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3006 transitions. [2022-03-15 16:02:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:26,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:26,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:26,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-03-15 16:02:26,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:26,932 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash 830567363, now seen corresponding path program 235 times [2022-03-15 16:02:26,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:26,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184170183] [2022-03-15 16:02:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:27,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:27,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184170183] [2022-03-15 16:02:27,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184170183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:27,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565631397] [2022-03-15 16:02:27,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:02:27,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:27,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:27,026 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:27,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-15 16:02:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:27,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 213 [2022-03-15 16:02:27,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:02:27,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:27,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:02:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:28,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:28,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-03-15 16:02:28,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 285 [2022-03-15 16:02:28,784 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:28,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 253 [2022-03-15 16:02:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:29,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565631397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:29,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:29,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:02:29,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445486639] [2022-03-15 16:02:29,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:29,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:02:29,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:02:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:02:29,019 INFO L87 Difference]: Start difference. First operand 875 states and 3006 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:29,133 INFO L93 Difference]: Finished difference Result 1083 states and 3619 transitions. [2022-03-15 16:02:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:02:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:29,135 INFO L225 Difference]: With dead ends: 1083 [2022-03-15 16:02:29,135 INFO L226 Difference]: Without dead ends: 1046 [2022-03-15 16:02:29,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:02:29,135 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:29,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 272 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-03-15 16:02:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-15 16:02:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 911. [2022-03-15 16:02:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.4285714285714284) internal successors, (3120), 910 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3120 transitions. [2022-03-15 16:02:29,145 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3120 transitions. Word has length 23 [2022-03-15 16:02:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:29,145 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 3120 transitions. [2022-03-15 16:02:29,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3120 transitions. [2022-03-15 16:02:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:29,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:29,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:29,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-03-15 16:02:29,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:29,347 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2114107551, now seen corresponding path program 236 times [2022-03-15 16:02:29,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:29,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815106383] [2022-03-15 16:02:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:29,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:29,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815106383] [2022-03-15 16:02:29,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815106383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:29,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242600337] [2022-03-15 16:02:29,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:02:29,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:29,554 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:29,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-15 16:02:29,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:29,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:30,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 268 [2022-03-15 16:02:30,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:02:30,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:30,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:02:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:30,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:31,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 276 [2022-03-15 16:02:31,516 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:31,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-15 16:02:31,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:02:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:31,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242600337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:31,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:31,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:02:31,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464955625] [2022-03-15 16:02:31,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:31,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:02:31,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:02:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:02:31,688 INFO L87 Difference]: Start difference. First operand 911 states and 3120 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:32,760 INFO L93 Difference]: Finished difference Result 1467 states and 4707 transitions. [2022-03-15 16:02:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:02:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:32,763 INFO L225 Difference]: With dead ends: 1467 [2022-03-15 16:02:32,763 INFO L226 Difference]: Without dead ends: 1425 [2022-03-15 16:02:32,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:02:32,763 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 158 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:32,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 774 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 975 Invalid, 0 Unknown, 391 Unchecked, 0.4s Time] [2022-03-15 16:02:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-03-15 16:02:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 965. [2022-03-15 16:02:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.412863070539419) internal successors, (3290), 964 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3290 transitions. [2022-03-15 16:02:32,776 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3290 transitions. Word has length 23 [2022-03-15 16:02:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:32,776 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 3290 transitions. [2022-03-15 16:02:32,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3290 transitions. [2022-03-15 16:02:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:32,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:32,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:32,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-03-15 16:02:32,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-15 16:02:32,982 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:32,983 INFO L85 PathProgramCache]: Analyzing trace with hash 685809875, now seen corresponding path program 237 times [2022-03-15 16:02:32,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:32,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557594031] [2022-03-15 16:02:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:32,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:33,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:33,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557594031] [2022-03-15 16:02:33,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557594031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:33,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108033902] [2022-03-15 16:02:33,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:02:33,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:33,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:33,088 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:33,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-15 16:02:33,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:02:33,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:33,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:02:34,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:34,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-03-15 16:02:34,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-03-15 16:02:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:34,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:34,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 217 [2022-03-15 16:02:34,740 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:34,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-15 16:02:34,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:02:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:34,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108033902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:34,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:34,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:02:34,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265034884] [2022-03-15 16:02:34,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:34,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:02:34,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:02:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:34,887 INFO L87 Difference]: Start difference. First operand 965 states and 3290 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:35,004 INFO L93 Difference]: Finished difference Result 1177 states and 3903 transitions. [2022-03-15 16:02:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:02:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:35,008 INFO L225 Difference]: With dead ends: 1177 [2022-03-15 16:02:35,008 INFO L226 Difference]: Without dead ends: 1158 [2022-03-15 16:02:35,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:35,009 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:35,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 291 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 304 Invalid, 0 Unknown, 316 Unchecked, 0.1s Time] [2022-03-15 16:02:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-03-15 16:02:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 989. [2022-03-15 16:02:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 3.402834008097166) internal successors, (3362), 988 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 3362 transitions. [2022-03-15 16:02:35,024 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 3362 transitions. Word has length 23 [2022-03-15 16:02:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:35,024 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 3362 transitions. [2022-03-15 16:02:35,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 3362 transitions. [2022-03-15 16:02:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:35,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:35,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:35,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-03-15 16:02:35,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:35,229 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash 188566481, now seen corresponding path program 238 times [2022-03-15 16:02:35,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:35,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585648761] [2022-03-15 16:02:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:35,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:35,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:35,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585648761] [2022-03-15 16:02:35,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585648761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:35,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741928354] [2022-03-15 16:02:35,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:02:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:35,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:35,329 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:35,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-15 16:02:35,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:02:35,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:35,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:35,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 241 [2022-03-15 16:02:36,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:36,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 195 [2022-03-15 16:02:36,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 153 [2022-03-15 16:02:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:36,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:36,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-03-15 16:02:37,028 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:37,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 143 [2022-03-15 16:02:37,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 127 [2022-03-15 16:02:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:37,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741928354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:37,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:37,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:02:37,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498060777] [2022-03-15 16:02:37,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:37,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:02:37,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:02:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:37,240 INFO L87 Difference]: Start difference. First operand 989 states and 3362 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:37,425 INFO L93 Difference]: Finished difference Result 1359 states and 4440 transitions. [2022-03-15 16:02:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:02:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:37,428 INFO L225 Difference]: With dead ends: 1359 [2022-03-15 16:02:37,428 INFO L226 Difference]: Without dead ends: 1300 [2022-03-15 16:02:37,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:02:37,428 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:37,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 246 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 292 Unchecked, 0.1s Time] [2022-03-15 16:02:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-03-15 16:02:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1065. [2022-03-15 16:02:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.369360902255639) internal successors, (3585), 1064 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3585 transitions. [2022-03-15 16:02:37,440 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3585 transitions. Word has length 23 [2022-03-15 16:02:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:37,440 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 3585 transitions. [2022-03-15 16:02:37,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3585 transitions. [2022-03-15 16:02:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:37,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:37,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:37,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-15 16:02:37,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-15 16:02:37,642 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:37,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:37,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1255182127, now seen corresponding path program 239 times [2022-03-15 16:02:37,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:37,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506075812] [2022-03-15 16:02:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:37,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:37,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506075812] [2022-03-15 16:02:37,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506075812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:37,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019610556] [2022-03-15 16:02:37,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:02:37,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:37,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:37,841 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:37,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-15 16:02:38,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:38,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:38,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:38,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:38,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 244 [2022-03-15 16:02:38,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:38,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-03-15 16:02:38,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-03-15 16:02:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:39,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:39,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 218 [2022-03-15 16:02:39,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 281 [2022-03-15 16:02:39,756 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:39,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 253 [2022-03-15 16:02:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:40,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019610556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:40,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:40,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:02:40,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132603096] [2022-03-15 16:02:40,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:40,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:02:40,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:02:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:02:40,005 INFO L87 Difference]: Start difference. First operand 1065 states and 3585 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:40,824 INFO L93 Difference]: Finished difference Result 1507 states and 4856 transitions. [2022-03-15 16:02:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:02:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:40,826 INFO L225 Difference]: With dead ends: 1507 [2022-03-15 16:02:40,826 INFO L226 Difference]: Without dead ends: 1436 [2022-03-15 16:02:40,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:02:40,827 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 134 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:40,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 569 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 876 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-03-15 16:02:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-03-15 16:02:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1069. [2022-03-15 16:02:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.3670411985018727) internal successors, (3596), 1068 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3596 transitions. [2022-03-15 16:02:40,839 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3596 transitions. Word has length 23 [2022-03-15 16:02:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:40,839 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 3596 transitions. [2022-03-15 16:02:40,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3596 transitions. [2022-03-15 16:02:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:40,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:40,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:40,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-15 16:02:41,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-15 16:02:41,041 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1755340789, now seen corresponding path program 240 times [2022-03-15 16:02:41,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:41,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857600542] [2022-03-15 16:02:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:41,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:41,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857600542] [2022-03-15 16:02:41,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857600542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:41,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042589717] [2022-03-15 16:02:41,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:02:41,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:41,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:41,218 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:41,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-15 16:02:41,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:02:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:41,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-03-15 16:02:42,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:42,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 187 [2022-03-15 16:02:42,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 145 [2022-03-15 16:02:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:42,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:42,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 244 [2022-03-15 16:02:42,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-15 16:02:42,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:42,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 189 [2022-03-15 16:02:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:43,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042589717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:43,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:43,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:02:43,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519302102] [2022-03-15 16:02:43,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:43,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:02:43,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:02:43,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:02:43,165 INFO L87 Difference]: Start difference. First operand 1069 states and 3596 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:44,472 INFO L93 Difference]: Finished difference Result 1639 states and 5179 transitions. [2022-03-15 16:02:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:02:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:44,475 INFO L225 Difference]: With dead ends: 1639 [2022-03-15 16:02:44,476 INFO L226 Difference]: Without dead ends: 1592 [2022-03-15 16:02:44,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=2560, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:02:44,476 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 182 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:44,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 873 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1080 Invalid, 0 Unknown, 427 Unchecked, 0.4s Time] [2022-03-15 16:02:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-03-15 16:02:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1122. [2022-03-15 16:02:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.3425512934879573) internal successors, (3747), 1121 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3747 transitions. [2022-03-15 16:02:44,490 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3747 transitions. Word has length 23 [2022-03-15 16:02:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:44,490 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3747 transitions. [2022-03-15 16:02:44,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3747 transitions. [2022-03-15 16:02:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:44,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:44,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:44,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-03-15 16:02:44,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:44,692 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1346898995, now seen corresponding path program 241 times [2022-03-15 16:02:44,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:44,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459502246] [2022-03-15 16:02:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:44,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:44,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:44,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459502246] [2022-03-15 16:02:44,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459502246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:44,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773960417] [2022-03-15 16:02:44,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:02:44,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:44,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:44,790 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:44,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-15 16:02:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:45,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:45,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:02:45,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:02:45,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:45,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:02:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:45,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:45,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:02:46,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-03-15 16:02:46,291 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:46,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 183 [2022-03-15 16:02:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:46,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773960417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:46,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:46,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:02:46,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489095398] [2022-03-15 16:02:46,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:46,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:02:46,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:46,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:02:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:02:46,437 INFO L87 Difference]: Start difference. First operand 1122 states and 3747 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:46,766 INFO L93 Difference]: Finished difference Result 1612 states and 5172 transitions. [2022-03-15 16:02:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:02:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:46,768 INFO L225 Difference]: With dead ends: 1612 [2022-03-15 16:02:46,768 INFO L226 Difference]: Without dead ends: 1590 [2022-03-15 16:02:46,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:02:46,769 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:46,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 343 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 548 Invalid, 0 Unknown, 613 Unchecked, 0.2s Time] [2022-03-15 16:02:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2022-03-15 16:02:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1138. [2022-03-15 16:02:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.337730870712401) internal successors, (3795), 1137 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3795 transitions. [2022-03-15 16:02:46,782 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3795 transitions. Word has length 23 [2022-03-15 16:02:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:46,782 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 3795 transitions. [2022-03-15 16:02:46,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3795 transitions. [2022-03-15 16:02:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:46,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:46,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:46,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-15 16:02:46,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:46,984 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash 800499773, now seen corresponding path program 242 times [2022-03-15 16:02:46,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:46,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51441166] [2022-03-15 16:02:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:47,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:47,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51441166] [2022-03-15 16:02:47,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51441166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:47,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978481158] [2022-03-15 16:02:47,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:02:47,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:47,121 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:47,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-15 16:02:47,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:47,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:02:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:47,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:02:48,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:02:48,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:48,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:02:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:48,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:48,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-03-15 16:02:48,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-15 16:02:48,807 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:48,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-03-15 16:02:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:48,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978481158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:48,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:48,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:02:48,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085991006] [2022-03-15 16:02:48,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:48,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:02:48,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:02:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:02:48,973 INFO L87 Difference]: Start difference. First operand 1138 states and 3795 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:50,131 INFO L93 Difference]: Finished difference Result 1839 states and 5752 transitions. [2022-03-15 16:02:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:02:50,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:50,135 INFO L225 Difference]: With dead ends: 1839 [2022-03-15 16:02:50,135 INFO L226 Difference]: Without dead ends: 1716 [2022-03-15 16:02:50,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=2094, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:02:50,135 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 140 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:50,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 673 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1006 Invalid, 0 Unknown, 353 Unchecked, 0.4s Time] [2022-03-15 16:02:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-03-15 16:02:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1214. [2022-03-15 16:02:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.3050288540807915) internal successors, (4009), 1213 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4009 transitions. [2022-03-15 16:02:50,163 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4009 transitions. Word has length 23 [2022-03-15 16:02:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:50,163 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4009 transitions. [2022-03-15 16:02:50,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4009 transitions. [2022-03-15 16:02:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:50,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:50,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:50,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:50,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:50,365 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:50,366 INFO L85 PathProgramCache]: Analyzing trace with hash -45159791, now seen corresponding path program 243 times [2022-03-15 16:02:50,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:50,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809320877] [2022-03-15 16:02:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:50,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:50,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:50,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809320877] [2022-03-15 16:02:50,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809320877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:50,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070026553] [2022-03-15 16:02:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:02:50,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:50,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:50,483 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:50,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-15 16:02:50,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:02:50,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:50,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:02:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:50,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:02:51,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:51,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 248 [2022-03-15 16:02:51,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-03-15 16:02:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:51,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:51,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-03-15 16:02:52,258 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:52,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-15 16:02:52,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:02:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:52,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070026553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:52,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:52,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-15 16:02:52,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879038993] [2022-03-15 16:02:52,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:52,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:02:52,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:02:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:02:52,413 INFO L87 Difference]: Start difference. First operand 1214 states and 4009 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:53,053 INFO L93 Difference]: Finished difference Result 1671 states and 5342 transitions. [2022-03-15 16:02:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:02:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:53,057 INFO L225 Difference]: With dead ends: 1671 [2022-03-15 16:02:53,057 INFO L226 Difference]: Without dead ends: 1606 [2022-03-15 16:02:53,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:02:53,058 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 118 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:53,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 392 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 575 Unchecked, 0.2s Time] [2022-03-15 16:02:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-03-15 16:02:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1142. [2022-03-15 16:02:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.322524101665206) internal successors, (3791), 1141 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3791 transitions. [2022-03-15 16:02:53,079 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3791 transitions. Word has length 23 [2022-03-15 16:02:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:53,079 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3791 transitions. [2022-03-15 16:02:53,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3791 transitions. [2022-03-15 16:02:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:53,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:53,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:53,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-03-15 16:02:53,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:53,299 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash 254845451, now seen corresponding path program 244 times [2022-03-15 16:02:53,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:53,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070936790] [2022-03-15 16:02:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:53,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:53,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070936790] [2022-03-15 16:02:53,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070936790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:53,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080288909] [2022-03-15 16:02:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:02:53,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:53,448 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:53,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-15 16:02:53,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:02:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:02:53,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:53,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-03-15 16:02:54,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:54,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 265 [2022-03-15 16:02:54,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 229 [2022-03-15 16:02:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:54,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:54,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-03-15 16:02:55,430 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:55,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 208 [2022-03-15 16:02:55,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 183 [2022-03-15 16:02:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:02:55,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080288909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:55,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:55,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:02:55,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989077625] [2022-03-15 16:02:55,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:55,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:02:55,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:02:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:02:55,615 INFO L87 Difference]: Start difference. First operand 1142 states and 3791 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:56,429 INFO L93 Difference]: Finished difference Result 1767 states and 5549 transitions. [2022-03-15 16:02:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:02:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:56,432 INFO L225 Difference]: With dead ends: 1767 [2022-03-15 16:02:56,432 INFO L226 Difference]: Without dead ends: 1677 [2022-03-15 16:02:56,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:02:56,433 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:56,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 456 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1039 Invalid, 0 Unknown, 209 Unchecked, 0.4s Time] [2022-03-15 16:02:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-03-15 16:02:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 991. [2022-03-15 16:02:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.3777777777777778) internal successors, (3344), 990 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3344 transitions. [2022-03-15 16:02:56,454 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3344 transitions. Word has length 23 [2022-03-15 16:02:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:56,454 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 3344 transitions. [2022-03-15 16:02:56,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3344 transitions. [2022-03-15 16:02:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:56,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:56,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:56,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-15 16:02:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:56,656 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 68979505, now seen corresponding path program 245 times [2022-03-15 16:02:56,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:56,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995951593] [2022-03-15 16:02:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:56,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:56,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995951593] [2022-03-15 16:02:56,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995951593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:56,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637304497] [2022-03-15 16:02:56,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:02:56,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:56,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:56,775 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:56,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-15 16:02:57,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:02:57,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:02:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:02:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:02:57,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-03-15 16:02:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:02:57,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-03-15 16:02:57,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-03-15 16:02:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:58,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:02:58,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:02:58,600 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:02:58,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-15 16:02:58,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:02:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:02:58,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637304497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:02:58,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:02:58,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:02:58,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129516408] [2022-03-15 16:02:58,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:02:58,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:02:58,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:02:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:02:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:02:58,759 INFO L87 Difference]: Start difference. First operand 991 states and 3344 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:02:59,351 INFO L93 Difference]: Finished difference Result 1631 states and 5169 transitions. [2022-03-15 16:02:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:02:59,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:02:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:02:59,354 INFO L225 Difference]: With dead ends: 1631 [2022-03-15 16:02:59,354 INFO L226 Difference]: Without dead ends: 1433 [2022-03-15 16:02:59,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:02:59,354 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:02:59,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 372 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 905 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-03-15 16:02:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-03-15 16:02:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1049. [2022-03-15 16:02:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.361641221374046) internal successors, (3523), 1048 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3523 transitions. [2022-03-15 16:02:59,377 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3523 transitions. Word has length 23 [2022-03-15 16:02:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:02:59,377 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 3523 transitions. [2022-03-15 16:02:59,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:02:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3523 transitions. [2022-03-15 16:02:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:02:59,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:02:59,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:02:59,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-03-15 16:02:59,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:59,579 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:02:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:02:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1605372777, now seen corresponding path program 246 times [2022-03-15 16:02:59,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:02:59,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185991920] [2022-03-15 16:02:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:02:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:02:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:02:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:02:59,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:02:59,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185991920] [2022-03-15 16:02:59,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185991920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:02:59,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755294276] [2022-03-15 16:02:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:02:59,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:02:59,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:02:59,817 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:02:59,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-15 16:03:00,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:03:00,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:00,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-03-15 16:03:00,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:00,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 232 [2022-03-15 16:03:00,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 180 [2022-03-15 16:03:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:01,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 360 treesize of output 324 [2022-03-15 16:03:02,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-15 16:03:02,030 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:02,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-03-15 16:03:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:02,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755294276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:02,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:02,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-03-15 16:03:02,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875998079] [2022-03-15 16:03:02,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:02,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:03:02,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:03:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:03:02,185 INFO L87 Difference]: Start difference. First operand 1049 states and 3523 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:03,213 INFO L93 Difference]: Finished difference Result 1424 states and 4631 transitions. [2022-03-15 16:03:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:03:03,214 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:03,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:03,216 INFO L225 Difference]: With dead ends: 1424 [2022-03-15 16:03:03,216 INFO L226 Difference]: Without dead ends: 1381 [2022-03-15 16:03:03,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:03:03,217 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 164 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:03,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 487 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1126 Invalid, 0 Unknown, 584 Unchecked, 0.4s Time] [2022-03-15 16:03:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-03-15 16:03:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1047. [2022-03-15 16:03:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.361376673040153) internal successors, (3516), 1046 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3516 transitions. [2022-03-15 16:03:03,229 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3516 transitions. Word has length 23 [2022-03-15 16:03:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:03,229 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3516 transitions. [2022-03-15 16:03:03,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3516 transitions. [2022-03-15 16:03:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:03,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:03,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:03,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-03-15 16:03:03,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:03,431 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash 220828289, now seen corresponding path program 247 times [2022-03-15 16:03:03,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:03,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736276665] [2022-03-15 16:03:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:03,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:03,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736276665] [2022-03-15 16:03:03,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736276665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:03,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428054393] [2022-03-15 16:03:03,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:03:03,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:03,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:03,602 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:03,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-15 16:03:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:03,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-03-15 16:03:04,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-03-15 16:03:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:04,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-03-15 16:03:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:05,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-15 16:03:05,643 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:05,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 237 [2022-03-15 16:03:05,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 209 [2022-03-15 16:03:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:05,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428054393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:05,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:05,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:03:05,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965676739] [2022-03-15 16:03:05,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:05,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:03:05,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:03:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:05,806 INFO L87 Difference]: Start difference. First operand 1047 states and 3516 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:07,223 INFO L93 Difference]: Finished difference Result 1712 states and 5459 transitions. [2022-03-15 16:03:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:03:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:07,226 INFO L225 Difference]: With dead ends: 1712 [2022-03-15 16:03:07,226 INFO L226 Difference]: Without dead ends: 1561 [2022-03-15 16:03:07,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=2852, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:03:07,227 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 183 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1133 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:07,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 651 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1155 Invalid, 0 Unknown, 1133 Unchecked, 0.4s Time] [2022-03-15 16:03:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2022-03-15 16:03:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1067. [2022-03-15 16:03:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.354596622889306) internal successors, (3576), 1066 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3576 transitions. [2022-03-15 16:03:07,249 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3576 transitions. Word has length 23 [2022-03-15 16:03:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:07,249 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3576 transitions. [2022-03-15 16:03:07,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3576 transitions. [2022-03-15 16:03:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:07,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:07,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:07,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:07,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-15 16:03:07,451 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1551787715, now seen corresponding path program 248 times [2022-03-15 16:03:07,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:07,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902395397] [2022-03-15 16:03:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:07,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:07,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902395397] [2022-03-15 16:03:07,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902395397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:07,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120425979] [2022-03-15 16:03:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:03:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:07,555 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:07,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-15 16:03:07,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:03:07,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:07,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:07,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-03-15 16:03:08,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:03:08,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:08,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:03:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:08,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:08,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-15 16:03:09,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-15 16:03:09,348 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:09,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 189 [2022-03-15 16:03:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:09,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120425979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:09,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:09,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:03:09,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852551756] [2022-03-15 16:03:09,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:09,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:03:09,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:03:09,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:03:09,506 INFO L87 Difference]: Start difference. First operand 1067 states and 3576 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:09,732 INFO L93 Difference]: Finished difference Result 1328 states and 4317 transitions. [2022-03-15 16:03:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:03:09,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:09,734 INFO L225 Difference]: With dead ends: 1328 [2022-03-15 16:03:09,734 INFO L226 Difference]: Without dead ends: 1274 [2022-03-15 16:03:09,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:03:09,734 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:09,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 229 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-03-15 16:03:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-03-15 16:03:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1090. [2022-03-15 16:03:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.3425160697887972) internal successors, (3640), 1089 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3640 transitions. [2022-03-15 16:03:09,746 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3640 transitions. Word has length 23 [2022-03-15 16:03:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:09,746 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 3640 transitions. [2022-03-15 16:03:09,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3640 transitions. [2022-03-15 16:03:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:09,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:09,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:09,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:09,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-15 16:03:09,948 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash 165612887, now seen corresponding path program 249 times [2022-03-15 16:03:09,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:09,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159572610] [2022-03-15 16:03:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:10,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:10,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159572610] [2022-03-15 16:03:10,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159572610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:10,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565858377] [2022-03-15 16:03:10,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:03:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:10,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:10,055 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:10,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-15 16:03:10,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:03:10,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:10,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 356 treesize of output 300 [2022-03-15 16:03:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:11,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-03-15 16:03:11,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-03-15 16:03:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:11,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:11,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-03-15 16:03:11,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-03-15 16:03:11,981 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:11,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 236 [2022-03-15 16:03:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:12,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565858377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:12,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:12,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:03:12,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118756724] [2022-03-15 16:03:12,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:03:12,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:03:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:03:12,159 INFO L87 Difference]: Start difference. First operand 1090 states and 3640 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:12,453 INFO L93 Difference]: Finished difference Result 1292 states and 4241 transitions. [2022-03-15 16:03:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:03:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:12,455 INFO L225 Difference]: With dead ends: 1292 [2022-03-15 16:03:12,455 INFO L226 Difference]: Without dead ends: 1249 [2022-03-15 16:03:12,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:12,455 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:12,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 620 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-03-15 16:03:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-03-15 16:03:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1090. [2022-03-15 16:03:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.3425160697887972) internal successors, (3640), 1089 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3640 transitions. [2022-03-15 16:03:12,467 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3640 transitions. Word has length 23 [2022-03-15 16:03:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:12,467 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 3640 transitions. [2022-03-15 16:03:12,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3640 transitions. [2022-03-15 16:03:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:12,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:12,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:12,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-03-15 16:03:12,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-15 16:03:12,669 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:12,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1593676253, now seen corresponding path program 250 times [2022-03-15 16:03:12,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:12,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090510232] [2022-03-15 16:03:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:12,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:12,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090510232] [2022-03-15 16:03:12,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090510232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:12,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160960056] [2022-03-15 16:03:12,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:03:12,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:12,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:12,857 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:12,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-15 16:03:13,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:03:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:13,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-03-15 16:03:13,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:13,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 233 [2022-03-15 16:03:13,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 181 [2022-03-15 16:03:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:14,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:14,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-03-15 16:03:14,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-15 16:03:14,790 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:14,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-03-15 16:03:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:14,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160960056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:14,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:14,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:03:14,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408906420] [2022-03-15 16:03:14,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:14,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:03:14,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:14,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:03:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:14,998 INFO L87 Difference]: Start difference. First operand 1090 states and 3640 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:16,631 INFO L93 Difference]: Finished difference Result 1789 states and 5516 transitions. [2022-03-15 16:03:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:03:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:16,635 INFO L225 Difference]: With dead ends: 1789 [2022-03-15 16:03:16,635 INFO L226 Difference]: Without dead ends: 1599 [2022-03-15 16:03:16,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=2372, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:03:16,635 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 185 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:16,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 807 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1650 Invalid, 0 Unknown, 582 Unchecked, 0.6s Time] [2022-03-15 16:03:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-03-15 16:03:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1116. [2022-03-15 16:03:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.3309417040358746) internal successors, (3714), 1115 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3714 transitions. [2022-03-15 16:03:16,649 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3714 transitions. Word has length 23 [2022-03-15 16:03:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:16,649 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3714 transitions. [2022-03-15 16:03:16,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3714 transitions. [2022-03-15 16:03:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:16,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:16,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:16,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-03-15 16:03:16,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-15 16:03:16,851 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash 93033907, now seen corresponding path program 251 times [2022-03-15 16:03:16,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:16,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065484306] [2022-03-15 16:03:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:16,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:16,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:16,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065484306] [2022-03-15 16:03:16,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065484306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:16,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979375139] [2022-03-15 16:03:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:03:16,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:16,992 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:16,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-15 16:03:17,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:03:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:03:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:17,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 233 [2022-03-15 16:03:18,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:03:18,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:18,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:03:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:18,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:18,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 276 [2022-03-15 16:03:19,164 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:19,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 291 [2022-03-15 16:03:19,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 251 [2022-03-15 16:03:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:19,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979375139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:19,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:19,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:03:19,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525323883] [2022-03-15 16:03:19,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:19,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:03:19,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:03:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:19,367 INFO L87 Difference]: Start difference. First operand 1116 states and 3714 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:22,352 INFO L93 Difference]: Finished difference Result 2916 states and 8992 transitions. [2022-03-15 16:03:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:03:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:22,357 INFO L225 Difference]: With dead ends: 2916 [2022-03-15 16:03:22,357 INFO L226 Difference]: Without dead ends: 2400 [2022-03-15 16:03:22,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=769, Invalid=6713, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:03:22,357 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 277 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:22,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 875 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1893 Invalid, 0 Unknown, 226 Unchecked, 0.7s Time] [2022-03-15 16:03:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-03-15 16:03:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1267. [2022-03-15 16:03:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.287519747235387) internal successors, (4162), 1266 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4162 transitions. [2022-03-15 16:03:22,376 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4162 transitions. Word has length 23 [2022-03-15 16:03:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:22,376 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 4162 transitions. [2022-03-15 16:03:22,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4162 transitions. [2022-03-15 16:03:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:22,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:22,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:22,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-15 16:03:22,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:22,579 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1844539249, now seen corresponding path program 252 times [2022-03-15 16:03:22,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:22,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712305198] [2022-03-15 16:03:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:22,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:22,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:22,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712305198] [2022-03-15 16:03:22,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712305198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:22,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575159418] [2022-03-15 16:03:22,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:03:22,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:22,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:22,706 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:22,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-15 16:03:22,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:03:22,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:23,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 233 [2022-03-15 16:03:23,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:23,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-03-15 16:03:23,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-03-15 16:03:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:23,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:24,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 286 [2022-03-15 16:03:24,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-03-15 16:03:24,673 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:24,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-03-15 16:03:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:24,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575159418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:24,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:24,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:03:24,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489088735] [2022-03-15 16:03:24,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:24,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:03:24,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:24,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:03:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:24,836 INFO L87 Difference]: Start difference. First operand 1267 states and 4162 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:26,071 INFO L93 Difference]: Finished difference Result 2103 states and 6556 transitions. [2022-03-15 16:03:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:03:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:26,075 INFO L225 Difference]: With dead ends: 2103 [2022-03-15 16:03:26,075 INFO L226 Difference]: Without dead ends: 1971 [2022-03-15 16:03:26,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=2659, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:03:26,075 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 183 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:26,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 703 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1246 Invalid, 0 Unknown, 537 Unchecked, 0.5s Time] [2022-03-15 16:03:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-03-15 16:03:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1313. [2022-03-15 16:03:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 3.276676829268293) internal successors, (4299), 1312 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 4299 transitions. [2022-03-15 16:03:26,092 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 4299 transitions. Word has length 23 [2022-03-15 16:03:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:26,092 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 4299 transitions. [2022-03-15 16:03:26,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 4299 transitions. [2022-03-15 16:03:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:26,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:26,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:26,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:26,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-03-15 16:03:26,294 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1649274903, now seen corresponding path program 253 times [2022-03-15 16:03:26,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:26,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879559948] [2022-03-15 16:03:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:26,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:26,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:26,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879559948] [2022-03-15 16:03:26,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879559948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:26,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519098804] [2022-03-15 16:03:26,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:03:26,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:26,437 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:26,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-15 16:03:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:26,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:26,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-03-15 16:03:27,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:27,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-03-15 16:03:27,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-15 16:03:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:27,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:27,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 217 [2022-03-15 16:03:28,252 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:28,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-15 16:03:28,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:03:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:28,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519098804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:28,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:28,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:03:28,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992439659] [2022-03-15 16:03:28,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:28,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:03:28,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:03:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:28,414 INFO L87 Difference]: Start difference. First operand 1313 states and 4299 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:29,428 INFO L93 Difference]: Finished difference Result 1795 states and 5603 transitions. [2022-03-15 16:03:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:03:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:29,431 INFO L225 Difference]: With dead ends: 1795 [2022-03-15 16:03:29,431 INFO L226 Difference]: Without dead ends: 1717 [2022-03-15 16:03:29,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:03:29,431 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 157 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:29,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 711 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1268 Invalid, 0 Unknown, 658 Unchecked, 0.5s Time] [2022-03-15 16:03:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-03-15 16:03:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1256. [2022-03-15 16:03:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.2916334661354583) internal successors, (4131), 1255 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4131 transitions. [2022-03-15 16:03:29,447 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4131 transitions. Word has length 23 [2022-03-15 16:03:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:29,447 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 4131 transitions. [2022-03-15 16:03:29,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4131 transitions. [2022-03-15 16:03:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:29,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:29,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:29,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:29,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:29,649 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -674292977, now seen corresponding path program 254 times [2022-03-15 16:03:29,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:29,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658875235] [2022-03-15 16:03:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:29,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:29,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658875235] [2022-03-15 16:03:29,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658875235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:29,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081270384] [2022-03-15 16:03:29,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:03:29,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:29,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:29,791 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:29,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-15 16:03:30,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:03:30,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:30,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:30,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 224 [2022-03-15 16:03:31,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 170 [2022-03-15 16:03:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:31,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-03-15 16:03:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:31,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:31,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-15 16:03:32,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-03-15 16:03:32,075 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:32,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 236 [2022-03-15 16:03:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:32,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081270384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:32,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:32,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:03:32,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636608845] [2022-03-15 16:03:32,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:32,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:03:32,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:03:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:03:32,298 INFO L87 Difference]: Start difference. First operand 1256 states and 4131 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:33,468 INFO L93 Difference]: Finished difference Result 1883 states and 5921 transitions. [2022-03-15 16:03:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:03:33,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:33,472 INFO L225 Difference]: With dead ends: 1883 [2022-03-15 16:03:33,472 INFO L226 Difference]: Without dead ends: 1752 [2022-03-15 16:03:33,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:03:33,472 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 198 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:33,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 588 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1275 Invalid, 0 Unknown, 615 Unchecked, 0.5s Time] [2022-03-15 16:03:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-03-15 16:03:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1267. [2022-03-15 16:03:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.2914691943127963) internal successors, (4167), 1266 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4167 transitions. [2022-03-15 16:03:33,488 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4167 transitions. Word has length 23 [2022-03-15 16:03:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:33,488 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 4167 transitions. [2022-03-15 16:03:33,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4167 transitions. [2022-03-15 16:03:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:33,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:33,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:33,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:33,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:33,690 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1987599061, now seen corresponding path program 255 times [2022-03-15 16:03:33,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:33,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883562612] [2022-03-15 16:03:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:33,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:33,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883562612] [2022-03-15 16:03:33,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883562612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:33,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747871716] [2022-03-15 16:03:33,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:03:33,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:33,784 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:33,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-15 16:03:34,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:03:34,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:34,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:34,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-03-15 16:03:34,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:03:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:34,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:03:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:34,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:34,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-03-15 16:03:35,514 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:35,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 280 [2022-03-15 16:03:35,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 236 [2022-03-15 16:03:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:35,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747871716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:35,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:35,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:03:35,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265063242] [2022-03-15 16:03:35,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:35,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:03:35,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:35,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:03:35,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:03:35,748 INFO L87 Difference]: Start difference. First operand 1267 states and 4167 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:35,910 INFO L93 Difference]: Finished difference Result 1656 states and 5234 transitions. [2022-03-15 16:03:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:03:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:35,913 INFO L225 Difference]: With dead ends: 1656 [2022-03-15 16:03:35,913 INFO L226 Difference]: Without dead ends: 1637 [2022-03-15 16:03:35,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:03:35,913 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:35,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 198 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-03-15 16:03:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2022-03-15 16:03:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1333. [2022-03-15 16:03:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.2687687687687688) internal successors, (4354), 1332 states have internal predecessors, (4354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4354 transitions. [2022-03-15 16:03:35,928 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4354 transitions. Word has length 23 [2022-03-15 16:03:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:35,928 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 4354 transitions. [2022-03-15 16:03:35,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4354 transitions. [2022-03-15 16:03:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:35,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:35,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:35,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-03-15 16:03:36,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:36,131 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1276997091, now seen corresponding path program 256 times [2022-03-15 16:03:36,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:36,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868288567] [2022-03-15 16:03:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:36,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:36,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:36,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868288567] [2022-03-15 16:03:36,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868288567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:36,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679742115] [2022-03-15 16:03:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:03:36,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:36,247 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:36,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-15 16:03:36,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:03:36,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:36,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-03-15 16:03:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:37,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-03-15 16:03:37,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-15 16:03:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:37,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:37,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 194 [2022-03-15 16:03:38,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-03-15 16:03:38,025 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:38,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-03-15 16:03:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:03:38,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679742115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:38,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:38,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-15 16:03:38,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621204319] [2022-03-15 16:03:38,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:38,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:03:38,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:03:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:03:38,239 INFO L87 Difference]: Start difference. First operand 1333 states and 4354 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:39,440 INFO L93 Difference]: Finished difference Result 2055 states and 6386 transitions. [2022-03-15 16:03:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:03:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:39,443 INFO L225 Difference]: With dead ends: 2055 [2022-03-15 16:03:39,443 INFO L226 Difference]: Without dead ends: 1998 [2022-03-15 16:03:39,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:03:39,444 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 163 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:39,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 682 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1471 Invalid, 0 Unknown, 448 Unchecked, 0.5s Time] [2022-03-15 16:03:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-03-15 16:03:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1326. [2022-03-15 16:03:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.2739622641509434) internal successors, (4338), 1325 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 4338 transitions. [2022-03-15 16:03:39,460 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 4338 transitions. Word has length 23 [2022-03-15 16:03:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:39,460 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 4338 transitions. [2022-03-15 16:03:39,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 4338 transitions. [2022-03-15 16:03:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:39,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:39,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:39,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-15 16:03:39,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:39,662 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:39,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1234605467, now seen corresponding path program 257 times [2022-03-15 16:03:39,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:39,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852192896] [2022-03-15 16:03:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:39,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:39,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:39,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852192896] [2022-03-15 16:03:39,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852192896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:39,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315113118] [2022-03-15 16:03:39,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:03:39,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:39,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:39,777 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:39,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-15 16:03:40,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:03:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:40,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2022-03-15 16:03:40,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:40,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 188 [2022-03-15 16:03:40,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-03-15 16:03:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:40,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:41,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-15 16:03:41,566 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:41,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 273 [2022-03-15 16:03:41,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2022-03-15 16:03:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:41,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315113118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:41,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:41,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:03:41,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541711587] [2022-03-15 16:03:41,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:03:41,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:03:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:03:41,753 INFO L87 Difference]: Start difference. First operand 1326 states and 4338 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:42,604 INFO L93 Difference]: Finished difference Result 1863 states and 6019 transitions. [2022-03-15 16:03:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:03:42,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:42,607 INFO L225 Difference]: With dead ends: 1863 [2022-03-15 16:03:42,607 INFO L226 Difference]: Without dead ends: 1724 [2022-03-15 16:03:42,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:03:42,607 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:42,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 557 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1058 Invalid, 0 Unknown, 243 Unchecked, 0.4s Time] [2022-03-15 16:03:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-03-15 16:03:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1374. [2022-03-15 16:03:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.2949745083758195) internal successors, (4524), 1373 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4524 transitions. [2022-03-15 16:03:42,628 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4524 transitions. Word has length 23 [2022-03-15 16:03:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:42,629 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 4524 transitions. [2022-03-15 16:03:42,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4524 transitions. [2022-03-15 16:03:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:42,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:42,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:42,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:42,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-03-15 16:03:42,847 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash 733952071, now seen corresponding path program 258 times [2022-03-15 16:03:42,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:42,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975411964] [2022-03-15 16:03:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:42,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:42,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975411964] [2022-03-15 16:03:42,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975411964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:42,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293590609] [2022-03-15 16:03:42,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:03:42,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:42,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:42,962 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:42,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-15 16:03:43,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:03:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:43,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:43,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 150 [2022-03-15 16:03:43,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:43,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-03-15 16:03:43,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 139 [2022-03-15 16:03:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:43,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:44,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-15 16:03:44,543 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:03:44,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 210 [2022-03-15 16:03:44,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 172 [2022-03-15 16:03:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:44,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293590609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:44,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:44,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:03:44,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763407694] [2022-03-15 16:03:44,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:44,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:03:44,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:03:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:03:44,697 INFO L87 Difference]: Start difference. First operand 1374 states and 4524 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:45,614 INFO L93 Difference]: Finished difference Result 1796 states and 5804 transitions. [2022-03-15 16:03:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:03:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:45,617 INFO L225 Difference]: With dead ends: 1796 [2022-03-15 16:03:45,617 INFO L226 Difference]: Without dead ends: 1705 [2022-03-15 16:03:45,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:03:45,617 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 77 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:45,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 572 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1237 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2022-03-15 16:03:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-03-15 16:03:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1379. [2022-03-15 16:03:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.298258345428157) internal successors, (4545), 1378 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4545 transitions. [2022-03-15 16:03:45,633 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4545 transitions. Word has length 23 [2022-03-15 16:03:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:45,633 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 4545 transitions. [2022-03-15 16:03:45,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4545 transitions. [2022-03-15 16:03:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:45,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:45,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:45,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-15 16:03:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-15 16:03:45,835 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1203625627, now seen corresponding path program 259 times [2022-03-15 16:03:45,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:45,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351222599] [2022-03-15 16:03:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:45,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:45,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351222599] [2022-03-15 16:03:45,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351222599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:45,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525155840] [2022-03-15 16:03:45,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:03:45,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:45,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:45,969 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-15 16:03:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:46,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-03-15 16:03:46,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:46,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 16:03:46,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-03-15 16:03:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:47,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:47,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-03-15 16:03:47,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-03-15 16:03:47,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:47,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 249 [2022-03-15 16:03:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:47,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525155840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:47,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:47,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:03:47,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145781373] [2022-03-15 16:03:47,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:47,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:03:47,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:03:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:03:47,995 INFO L87 Difference]: Start difference. First operand 1379 states and 4545 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:48,510 INFO L93 Difference]: Finished difference Result 1800 states and 5814 transitions. [2022-03-15 16:03:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:03:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:48,513 INFO L225 Difference]: With dead ends: 1800 [2022-03-15 16:03:48,513 INFO L226 Difference]: Without dead ends: 1726 [2022-03-15 16:03:48,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:03:48,513 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:48,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 249 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 725 Invalid, 0 Unknown, 194 Unchecked, 0.3s Time] [2022-03-15 16:03:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2022-03-15 16:03:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1386. [2022-03-15 16:03:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.3090252707581227) internal successors, (4583), 1385 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4583 transitions. [2022-03-15 16:03:48,528 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4583 transitions. Word has length 23 [2022-03-15 16:03:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:48,529 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 4583 transitions. [2022-03-15 16:03:48,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4583 transitions. [2022-03-15 16:03:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:48,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:48,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:48,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:48,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-15 16:03:48,731 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1068312533, now seen corresponding path program 260 times [2022-03-15 16:03:48,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:48,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785768773] [2022-03-15 16:03:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:48,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:48,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785768773] [2022-03-15 16:03:48,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785768773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:48,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976743833] [2022-03-15 16:03:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:03:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:48,895 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:48,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-15 16:03:49,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:03:49,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:49,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-03-15 16:03:49,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:49,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-03-15 16:03:49,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-15 16:03:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:50,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:03:50,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 268 [2022-03-15 16:03:50,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:50,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 251 [2022-03-15 16:03:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:50,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976743833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:50,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:50,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:03:50,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847575917] [2022-03-15 16:03:50,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:50,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:03:50,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:50,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:03:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:50,900 INFO L87 Difference]: Start difference. First operand 1386 states and 4583 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:52,845 INFO L93 Difference]: Finished difference Result 2034 states and 6352 transitions. [2022-03-15 16:03:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:03:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:52,848 INFO L225 Difference]: With dead ends: 2034 [2022-03-15 16:03:52,849 INFO L226 Difference]: Without dead ends: 1867 [2022-03-15 16:03:52,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=3387, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:03:52,849 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 170 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:52,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 692 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1377 Invalid, 0 Unknown, 449 Unchecked, 0.5s Time] [2022-03-15 16:03:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2022-03-15 16:03:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1351. [2022-03-15 16:03:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.2785185185185184) internal successors, (4426), 1350 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4426 transitions. [2022-03-15 16:03:52,865 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4426 transitions. Word has length 23 [2022-03-15 16:03:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:52,865 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 4426 transitions. [2022-03-15 16:03:52,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4426 transitions. [2022-03-15 16:03:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:52,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:52,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:52,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-15 16:03:53,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:53,067 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1727972133, now seen corresponding path program 261 times [2022-03-15 16:03:53,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:53,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415356516] [2022-03-15 16:03:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:53,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:53,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415356516] [2022-03-15 16:03:53,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415356516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:53,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163081283] [2022-03-15 16:03:53,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:03:53,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:53,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:53,179 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:53,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-15 16:03:53,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:03:53,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:53,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:53,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:53,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:03:54,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:54,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-03-15 16:03:54,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-15 16:03:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:54,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:54,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-03-15 16:03:55,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-03-15 16:03:55,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:55,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 302 treesize of output 264 [2022-03-15 16:03:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:55,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163081283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:55,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:55,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:03:55,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276521990] [2022-03-15 16:03:55,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:55,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:03:55,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:03:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:03:55,312 INFO L87 Difference]: Start difference. First operand 1351 states and 4426 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:55,557 INFO L93 Difference]: Finished difference Result 1590 states and 5104 transitions. [2022-03-15 16:03:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:03:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:55,559 INFO L225 Difference]: With dead ends: 1590 [2022-03-15 16:03:55,559 INFO L226 Difference]: Without dead ends: 1528 [2022-03-15 16:03:55,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:03:55,559 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:55,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 206 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 510 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-03-15 16:03:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-03-15 16:03:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1345. [2022-03-15 16:03:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.2819940476190474) internal successors, (4411), 1344 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4411 transitions. [2022-03-15 16:03:55,574 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4411 transitions. Word has length 23 [2022-03-15 16:03:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:55,574 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4411 transitions. [2022-03-15 16:03:55,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4411 transitions. [2022-03-15 16:03:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:55,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:55,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:55,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-03-15 16:03:55,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-15 16:03:55,776 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:55,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1340709133, now seen corresponding path program 262 times [2022-03-15 16:03:55,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:55,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283996797] [2022-03-15 16:03:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:55,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:55,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:55,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283996797] [2022-03-15 16:03:55,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283996797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:55,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307179666] [2022-03-15 16:03:55,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:03:55,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:55,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:55,959 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:55,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-15 16:03:56,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:03:56,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:56,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:56,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:03:56,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:03:56,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:56,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:03:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:56,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:03:57,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-03-15 16:03:57,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 287 [2022-03-15 16:03:57,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:03:57,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 266 [2022-03-15 16:03:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:57,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307179666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:03:57,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:03:57,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:03:57,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267499165] [2022-03-15 16:03:57,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:03:57,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:03:57,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:03:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:03:57,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:03:57,682 INFO L87 Difference]: Start difference. First operand 1345 states and 4411 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:03:58,525 INFO L93 Difference]: Finished difference Result 1745 states and 5444 transitions. [2022-03-15 16:03:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:03:58,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:03:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:03:58,528 INFO L225 Difference]: With dead ends: 1745 [2022-03-15 16:03:58,528 INFO L226 Difference]: Without dead ends: 1638 [2022-03-15 16:03:58,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:03:58,529 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 111 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:03:58,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 553 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1179 Invalid, 0 Unknown, 178 Unchecked, 0.4s Time] [2022-03-15 16:03:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-03-15 16:03:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1384. [2022-03-15 16:03:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 3.274765003615329) internal successors, (4529), 1383 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 4529 transitions. [2022-03-15 16:03:58,545 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 4529 transitions. Word has length 23 [2022-03-15 16:03:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:03:58,545 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 4529 transitions. [2022-03-15 16:03:58,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:03:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 4529 transitions. [2022-03-15 16:03:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:03:58,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:03:58,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:03:58,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-03-15 16:03:58,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-03-15 16:03:58,747 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:03:58,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:03:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1691223081, now seen corresponding path program 263 times [2022-03-15 16:03:58,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:03:58,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011231947] [2022-03-15 16:03:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:03:58,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:03:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:03:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:03:58,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:03:58,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011231947] [2022-03-15 16:03:58,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011231947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:03:58,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646988779] [2022-03-15 16:03:58,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:03:58,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:03:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:03:58,885 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:03:58,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-15 16:03:59,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:03:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:03:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:03:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:03:59,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-03-15 16:03:59,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:03:59,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 240 [2022-03-15 16:03:59,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 208 [2022-03-15 16:03:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:03:59,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:00,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-03-15 16:04:00,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:04:00,603 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:04:00,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-03-15 16:04:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:00,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646988779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:00,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:00,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:04:00,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264538035] [2022-03-15 16:04:00,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:00,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:04:00,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:04:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:04:00,715 INFO L87 Difference]: Start difference. First operand 1384 states and 4529 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:02,175 INFO L93 Difference]: Finished difference Result 2227 states and 6953 transitions. [2022-03-15 16:04:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:04:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:02,179 INFO L225 Difference]: With dead ends: 2227 [2022-03-15 16:04:02,179 INFO L226 Difference]: Without dead ends: 2045 [2022-03-15 16:04:02,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=2657, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:04:02,179 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 123 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:02,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 672 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1255 Invalid, 0 Unknown, 274 Unchecked, 0.5s Time] [2022-03-15 16:04:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2022-03-15 16:04:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1461. [2022-03-15 16:04:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.2815068493150683) internal successors, (4791), 1460 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4791 transitions. [2022-03-15 16:04:02,197 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4791 transitions. Word has length 23 [2022-03-15 16:04:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:02,197 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4791 transitions. [2022-03-15 16:04:02,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4791 transitions. [2022-03-15 16:04:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:02,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:02,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:02,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-15 16:04:02,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:02,399 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash 146976779, now seen corresponding path program 264 times [2022-03-15 16:04:02,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:02,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447346046] [2022-03-15 16:04:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:02,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:02,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447346046] [2022-03-15 16:04:02,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447346046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:02,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887509106] [2022-03-15 16:04:02,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:04:02,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:02,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:02,507 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:02,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-15 16:04:02,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:04:02,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:02,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:04:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:02,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 188 [2022-03-15 16:04:03,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:04:03,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:03,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:04:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:03,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:03,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-03-15 16:04:04,125 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:04:04,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 273 [2022-03-15 16:04:04,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2022-03-15 16:04:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:04,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887509106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:04,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:04,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:04:04,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32464754] [2022-03-15 16:04:04,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:04,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:04:04,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:04:04,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:04:04,338 INFO L87 Difference]: Start difference. First operand 1461 states and 4791 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:05,327 INFO L93 Difference]: Finished difference Result 2299 states and 7244 transitions. [2022-03-15 16:04:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:04:05,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:05,331 INFO L225 Difference]: With dead ends: 2299 [2022-03-15 16:04:05,331 INFO L226 Difference]: Without dead ends: 2144 [2022-03-15 16:04:05,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:04:05,332 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:05,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 628 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1251 Invalid, 0 Unknown, 406 Unchecked, 0.4s Time] [2022-03-15 16:04:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-03-15 16:04:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1524. [2022-03-15 16:04:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.2823374917925148) internal successors, (4999), 1523 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4999 transitions. [2022-03-15 16:04:05,364 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4999 transitions. Word has length 23 [2022-03-15 16:04:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:05,364 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 4999 transitions. [2022-03-15 16:04:05,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:05,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4999 transitions. [2022-03-15 16:04:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:05,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:05,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:05,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:05,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-15 16:04:05,567 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2006278679, now seen corresponding path program 265 times [2022-03-15 16:04:05,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:05,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340555361] [2022-03-15 16:04:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:05,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:05,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340555361] [2022-03-15 16:04:05,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340555361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:05,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230565680] [2022-03-15 16:04:05,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:04:05,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:05,709 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:05,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-15 16:04:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:06,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-03-15 16:04:06,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:06,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 167 [2022-03-15 16:04:06,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-03-15 16:04:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:06,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:06,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-03-15 16:04:07,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 249 [2022-03-15 16:04:07,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:07,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 222 [2022-03-15 16:04:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:07,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230565680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:07,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:07,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:04:07,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483040332] [2022-03-15 16:04:07,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:07,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:04:07,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:07,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:04:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:04:07,481 INFO L87 Difference]: Start difference. First operand 1524 states and 4999 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:08,302 INFO L93 Difference]: Finished difference Result 2119 states and 6743 transitions. [2022-03-15 16:04:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:04:08,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:08,306 INFO L225 Difference]: With dead ends: 2119 [2022-03-15 16:04:08,306 INFO L226 Difference]: Without dead ends: 1968 [2022-03-15 16:04:08,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:04:08,306 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 230 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:08,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 314 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1090 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2022-03-15 16:04:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-03-15 16:04:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1503. [2022-03-15 16:04:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.2942743009320905) internal successors, (4948), 1502 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 4948 transitions. [2022-03-15 16:04:08,323 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 4948 transitions. Word has length 23 [2022-03-15 16:04:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:08,323 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 4948 transitions. [2022-03-15 16:04:08,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 4948 transitions. [2022-03-15 16:04:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:08,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:08,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:08,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-15 16:04:08,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:08,526 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1448587413, now seen corresponding path program 266 times [2022-03-15 16:04:08,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:08,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693704775] [2022-03-15 16:04:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:08,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:08,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:08,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693704775] [2022-03-15 16:04:08,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693704775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:08,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125357242] [2022-03-15 16:04:08,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:04:08,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:08,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:08,652 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:08,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-15 16:04:08,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:04:08,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:04:08,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:09,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-03-15 16:04:09,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-15 16:04:09,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:09,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:04:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:09,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:09,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-15 16:04:10,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-03-15 16:04:10,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:10,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 253 [2022-03-15 16:04:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:10,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125357242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:10,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:10,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:04:10,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036431254] [2022-03-15 16:04:10,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:10,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:04:10,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:04:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:04:10,628 INFO L87 Difference]: Start difference. First operand 1503 states and 4948 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:11,270 INFO L93 Difference]: Finished difference Result 2025 states and 6415 transitions. [2022-03-15 16:04:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:04:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:11,273 INFO L225 Difference]: With dead ends: 2025 [2022-03-15 16:04:11,273 INFO L226 Difference]: Without dead ends: 1828 [2022-03-15 16:04:11,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:04:11,274 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:11,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 510 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1216 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-03-15 16:04:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-03-15 16:04:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1552. [2022-03-15 16:04:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.3120567375886525) internal successors, (5137), 1551 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5137 transitions. [2022-03-15 16:04:11,291 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5137 transitions. Word has length 23 [2022-03-15 16:04:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:11,291 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5137 transitions. [2022-03-15 16:04:11,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5137 transitions. [2022-03-15 16:04:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:11,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:11,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:11,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-15 16:04:11,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:11,494 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2083891563, now seen corresponding path program 267 times [2022-03-15 16:04:11,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:11,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135204841] [2022-03-15 16:04:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:11,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:11,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:11,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135204841] [2022-03-15 16:04:11,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135204841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:11,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358207934] [2022-03-15 16:04:11,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:04:11,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:11,622 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:11,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-15 16:04:11,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:04:11,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:12,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 184 [2022-03-15 16:04:12,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:04:12,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:12,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:04:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:12,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:12,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-03-15 16:04:13,285 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:04:13,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 275 [2022-03-15 16:04:13,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 221 [2022-03-15 16:04:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:13,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358207934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:13,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:13,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:04:13,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074955001] [2022-03-15 16:04:13,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:13,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:04:13,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:04:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:04:13,479 INFO L87 Difference]: Start difference. First operand 1552 states and 5137 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:14,416 INFO L93 Difference]: Finished difference Result 2203 states and 7053 transitions. [2022-03-15 16:04:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:04:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:14,419 INFO L225 Difference]: With dead ends: 2203 [2022-03-15 16:04:14,419 INFO L226 Difference]: Without dead ends: 2061 [2022-03-15 16:04:14,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:04:14,419 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 113 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:14,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 544 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 987 Invalid, 0 Unknown, 326 Unchecked, 0.4s Time] [2022-03-15 16:04:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-03-15 16:04:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1603. [2022-03-15 16:04:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.309612983770287) internal successors, (5302), 1602 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5302 transitions. [2022-03-15 16:04:14,438 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5302 transitions. Word has length 23 [2022-03-15 16:04:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:14,438 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 5302 transitions. [2022-03-15 16:04:14,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5302 transitions. [2022-03-15 16:04:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:14,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:14,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:14,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-03-15 16:04:14,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-03-15 16:04:14,641 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 958155809, now seen corresponding path program 268 times [2022-03-15 16:04:14,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:14,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920229121] [2022-03-15 16:04:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:14,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:14,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:14,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920229121] [2022-03-15 16:04:14,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920229121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:14,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707482218] [2022-03-15 16:04:14,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:04:14,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:14,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:14,747 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:14,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-15 16:04:15,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:04:15,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:15,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 188 [2022-03-15 16:04:15,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:04:15,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:15,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:04:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:15,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:15,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-03-15 16:04:16,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:16,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 247 [2022-03-15 16:04:16,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 181 [2022-03-15 16:04:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:16,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707482218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:16,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:16,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:04:16,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293733197] [2022-03-15 16:04:16,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:16,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:04:16,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:16,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:04:16,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:04:16,555 INFO L87 Difference]: Start difference. First operand 1603 states and 5302 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:18,294 INFO L93 Difference]: Finished difference Result 2151 states and 6988 transitions. [2022-03-15 16:04:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:04:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:18,297 INFO L225 Difference]: With dead ends: 2151 [2022-03-15 16:04:18,297 INFO L226 Difference]: Without dead ends: 2010 [2022-03-15 16:04:18,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=335, Invalid=2745, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:04:18,298 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 142 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:18,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 542 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1750 Invalid, 0 Unknown, 172 Unchecked, 0.7s Time] [2022-03-15 16:04:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-03-15 16:04:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1640. [2022-03-15 16:04:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.325198291641245) internal successors, (5450), 1639 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5450 transitions. [2022-03-15 16:04:18,316 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5450 transitions. Word has length 23 [2022-03-15 16:04:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:18,316 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 5450 transitions. [2022-03-15 16:04:18,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5450 transitions. [2022-03-15 16:04:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:18,318 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:18,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:18,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-15 16:04:18,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-03-15 16:04:18,519 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:18,519 INFO L85 PathProgramCache]: Analyzing trace with hash -324990303, now seen corresponding path program 269 times [2022-03-15 16:04:18,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:18,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985662784] [2022-03-15 16:04:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:18,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:18,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:18,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985662784] [2022-03-15 16:04:18,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985662784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:18,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088125395] [2022-03-15 16:04:18,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:04:18,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:18,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:18,645 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:18,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-15 16:04:18,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:04:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:19,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-03-15 16:04:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:19,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-15 16:04:19,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-03-15 16:04:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:19,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:19,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:04:20,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:20,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 291 [2022-03-15 16:04:20,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 223 [2022-03-15 16:04:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:20,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088125395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:20,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:20,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:04:20,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354600741] [2022-03-15 16:04:20,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:20,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:04:20,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:04:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:04:20,365 INFO L87 Difference]: Start difference. First operand 1640 states and 5450 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:22,525 INFO L93 Difference]: Finished difference Result 2213 states and 7056 transitions. [2022-03-15 16:04:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:04:22,526 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:22,529 INFO L225 Difference]: With dead ends: 2213 [2022-03-15 16:04:22,529 INFO L226 Difference]: Without dead ends: 2113 [2022-03-15 16:04:22,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=434, Invalid=3348, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:04:22,529 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 180 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:22,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 610 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1356 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2022-03-15 16:04:22,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2022-03-15 16:04:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1634. [2022-03-15 16:04:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.333741579914268) internal successors, (5444), 1633 states have internal predecessors, (5444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5444 transitions. [2022-03-15 16:04:22,547 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5444 transitions. Word has length 23 [2022-03-15 16:04:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:22,547 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 5444 transitions. [2022-03-15 16:04:22,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5444 transitions. [2022-03-15 16:04:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:22,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:22,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:22,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:22,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:22,750 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2032399295, now seen corresponding path program 270 times [2022-03-15 16:04:22,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:22,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774733330] [2022-03-15 16:04:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:22,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:22,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:22,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774733330] [2022-03-15 16:04:22,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774733330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:22,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79354798] [2022-03-15 16:04:22,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:04:22,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:22,890 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:22,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-15 16:04:23,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:04:23,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:23,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:04:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:23,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 150 [2022-03-15 16:04:23,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 155 [2022-03-15 16:04:23,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-03-15 16:04:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:23,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:24,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-15 16:04:24,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:24,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 265 [2022-03-15 16:04:24,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 198 [2022-03-15 16:04:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:24,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79354798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:24,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:24,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-15 16:04:24,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710247124] [2022-03-15 16:04:24,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:24,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:04:24,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:24,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:04:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:04:24,807 INFO L87 Difference]: Start difference. First operand 1634 states and 5444 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:27,683 INFO L93 Difference]: Finished difference Result 3257 states and 10137 transitions. [2022-03-15 16:04:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:04:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:27,688 INFO L225 Difference]: With dead ends: 3257 [2022-03-15 16:04:27,688 INFO L226 Difference]: Without dead ends: 2911 [2022-03-15 16:04:27,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=389, Invalid=3643, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:04:27,688 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 212 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 3978 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:27,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1141 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3978 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:04:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2022-03-15 16:04:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1683. [2022-03-15 16:04:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3644470868014267) internal successors, (5659), 1682 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5659 transitions. [2022-03-15 16:04:27,711 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5659 transitions. Word has length 23 [2022-03-15 16:04:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:27,712 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5659 transitions. [2022-03-15 16:04:27,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5659 transitions. [2022-03-15 16:04:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:27,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:27,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:27,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-03-15 16:04:27,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-15 16:04:27,914 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1130084337, now seen corresponding path program 271 times [2022-03-15 16:04:27,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:27,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230065847] [2022-03-15 16:04:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:28,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:28,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230065847] [2022-03-15 16:04:28,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230065847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:28,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643762272] [2022-03-15 16:04:28,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:04:28,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:28,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:28,034 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:28,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-15 16:04:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:28,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:04:29,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:29,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 272 [2022-03-15 16:04:29,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 222 [2022-03-15 16:04:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:29,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:29,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 280 [2022-03-15 16:04:29,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 249 [2022-03-15 16:04:29,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:29,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 222 [2022-03-15 16:04:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:30,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643762272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:30,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:30,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-15 16:04:30,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620815768] [2022-03-15 16:04:30,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:30,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:04:30,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:04:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:04:30,220 INFO L87 Difference]: Start difference. First operand 1683 states and 5659 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:31,774 INFO L93 Difference]: Finished difference Result 2540 states and 8128 transitions. [2022-03-15 16:04:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:04:31,774 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:31,778 INFO L225 Difference]: With dead ends: 2540 [2022-03-15 16:04:31,778 INFO L226 Difference]: Without dead ends: 2310 [2022-03-15 16:04:31,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=2674, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:04:31,779 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 197 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:31,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 677 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1717 Invalid, 0 Unknown, 403 Unchecked, 0.6s Time] [2022-03-15 16:04:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-03-15 16:04:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1687. [2022-03-15 16:04:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.3499406880189797) internal successors, (5648), 1686 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5648 transitions. [2022-03-15 16:04:31,800 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5648 transitions. Word has length 23 [2022-03-15 16:04:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:31,800 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 5648 transitions. [2022-03-15 16:04:31,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5648 transitions. [2022-03-15 16:04:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:31,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:31,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:31,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:32,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-15 16:04:32,002 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash -368810315, now seen corresponding path program 272 times [2022-03-15 16:04:32,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:32,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224951134] [2022-03-15 16:04:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:32,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:32,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224951134] [2022-03-15 16:04:32,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224951134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:32,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008875380] [2022-03-15 16:04:32,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:04:32,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:32,127 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:32,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-15 16:04:32,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:04:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:32,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-15 16:04:32,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 227 [2022-03-15 16:04:32,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:32,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 228 [2022-03-15 16:04:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:33,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:33,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 196 [2022-03-15 16:04:33,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:33,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 232 [2022-03-15 16:04:33,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2022-03-15 16:04:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:34,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008875380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:34,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:34,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-15 16:04:34,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500654173] [2022-03-15 16:04:34,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:34,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:04:34,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:34,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:04:34,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:04:34,288 INFO L87 Difference]: Start difference. First operand 1687 states and 5648 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:35,121 INFO L93 Difference]: Finished difference Result 2724 states and 8989 transitions. [2022-03-15 16:04:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:04:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:35,126 INFO L225 Difference]: With dead ends: 2724 [2022-03-15 16:04:35,126 INFO L226 Difference]: Without dead ends: 2600 [2022-03-15 16:04:35,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:04:35,126 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 189 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:35,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 315 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1048 Invalid, 0 Unknown, 135 Unchecked, 0.4s Time] [2022-03-15 16:04:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2022-03-15 16:04:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1832. [2022-03-15 16:04:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.442381212452212) internal successors, (6303), 1831 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6303 transitions. [2022-03-15 16:04:35,149 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6303 transitions. Word has length 23 [2022-03-15 16:04:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:35,149 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 6303 transitions. [2022-03-15 16:04:35,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6303 transitions. [2022-03-15 16:04:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:35,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:35,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:35,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-03-15 16:04:35,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:35,352 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash -960967623, now seen corresponding path program 273 times [2022-03-15 16:04:35,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:35,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810393872] [2022-03-15 16:04:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:35,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:35,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810393872] [2022-03-15 16:04:35,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810393872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444487551] [2022-03-15 16:04:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:04:35,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:35,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:35,522 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:35,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-15 16:04:35,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:04:35,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:04:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:35,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:04:36,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:36,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-03-15 16:04:36,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 143 [2022-03-15 16:04:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:36,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:37,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 276 [2022-03-15 16:04:37,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:04:37,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:37,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 146 [2022-03-15 16:04:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:37,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444487551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:37,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:37,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:04:37,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520348706] [2022-03-15 16:04:37,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:37,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:04:37,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:37,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:04:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:04:37,728 INFO L87 Difference]: Start difference. First operand 1832 states and 6303 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:40,218 INFO L93 Difference]: Finished difference Result 4195 states and 12886 transitions. [2022-03-15 16:04:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:04:40,219 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:40,225 INFO L225 Difference]: With dead ends: 4195 [2022-03-15 16:04:40,225 INFO L226 Difference]: Without dead ends: 3983 [2022-03-15 16:04:40,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=551, Invalid=3739, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:04:40,226 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 502 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:40,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 624 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1997 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:04:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-03-15 16:04:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 1868. [2022-03-15 16:04:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.468130690948045) internal successors, (6475), 1867 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6475 transitions. [2022-03-15 16:04:40,261 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6475 transitions. Word has length 23 [2022-03-15 16:04:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:40,261 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 6475 transitions. [2022-03-15 16:04:40,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6475 transitions. [2022-03-15 16:04:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:40,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:40,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:40,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-15 16:04:40,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:40,464 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1003705529, now seen corresponding path program 274 times [2022-03-15 16:04:40,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:40,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160480248] [2022-03-15 16:04:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:40,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:40,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160480248] [2022-03-15 16:04:40,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160480248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:40,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022955359] [2022-03-15 16:04:40,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:04:40,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:40,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:40,605 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:40,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-15 16:04:40,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:04:40,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:40,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:04:41,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:41,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 286 [2022-03-15 16:04:41,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 238 [2022-03-15 16:04:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:41,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:41,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 263 [2022-03-15 16:04:42,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:04:42,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:42,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 140 [2022-03-15 16:04:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:42,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022955359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:42,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:42,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-15 16:04:42,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103652663] [2022-03-15 16:04:42,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:42,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:04:42,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:04:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:04:42,525 INFO L87 Difference]: Start difference. First operand 1868 states and 6475 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:43,305 INFO L93 Difference]: Finished difference Result 2783 states and 9075 transitions. [2022-03-15 16:04:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:04:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:43,310 INFO L225 Difference]: With dead ends: 2783 [2022-03-15 16:04:43,310 INFO L226 Difference]: Without dead ends: 2663 [2022-03-15 16:04:43,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:04:43,310 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 146 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:43,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 301 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:04:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-03-15 16:04:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1910. [2022-03-15 16:04:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.471974855945521) internal successors, (6628), 1909 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6628 transitions. [2022-03-15 16:04:43,333 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6628 transitions. Word has length 23 [2022-03-15 16:04:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:43,333 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 6628 transitions. [2022-03-15 16:04:43,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6628 transitions. [2022-03-15 16:04:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:43,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:43,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:43,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-15 16:04:43,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-15 16:04:43,536 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:43,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1976313859, now seen corresponding path program 275 times [2022-03-15 16:04:43,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:43,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033426020] [2022-03-15 16:04:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:43,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:43,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:43,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033426020] [2022-03-15 16:04:43,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033426020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:43,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640141191] [2022-03-15 16:04:43,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:04:43,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:43,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:43,640 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:43,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-15 16:04:43,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:04:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:43,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-03-15 16:04:44,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:04:44,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:44,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:04:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:44,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:44,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 235 [2022-03-15 16:04:45,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-03-15 16:04:45,241 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:04:45,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 132 [2022-03-15 16:04:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:45,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640141191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:45,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:45,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:04:45,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631340608] [2022-03-15 16:04:45,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:45,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:04:45,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:04:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:04:45,367 INFO L87 Difference]: Start difference. First operand 1910 states and 6628 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:46,151 INFO L93 Difference]: Finished difference Result 2776 states and 9171 transitions. [2022-03-15 16:04:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:04:46,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:46,156 INFO L225 Difference]: With dead ends: 2776 [2022-03-15 16:04:46,156 INFO L226 Difference]: Without dead ends: 2593 [2022-03-15 16:04:46,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:04:46,156 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:46,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 525 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1009 Invalid, 0 Unknown, 644 Unchecked, 0.4s Time] [2022-03-15 16:04:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-03-15 16:04:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 1899. [2022-03-15 16:04:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.464172813487882) internal successors, (6575), 1898 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 6575 transitions. [2022-03-15 16:04:46,180 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 6575 transitions. Word has length 23 [2022-03-15 16:04:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:46,180 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 6575 transitions. [2022-03-15 16:04:46,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 6575 transitions. [2022-03-15 16:04:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:46,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:46,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:46,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-03-15 16:04:46,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:46,383 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2127127851, now seen corresponding path program 276 times [2022-03-15 16:04:46,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:46,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362413257] [2022-03-15 16:04:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:46,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:46,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:46,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362413257] [2022-03-15 16:04:46,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362413257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:46,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824537427] [2022-03-15 16:04:46,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:04:46,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:46,539 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:46,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-15 16:04:46,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:04:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:46,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:04:46,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:46,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 197 [2022-03-15 16:04:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:47,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 161 [2022-03-15 16:04:47,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-03-15 16:04:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:47,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:47,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-15 16:04:48,452 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:04:48,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 224 [2022-03-15 16:04:48,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2022-03-15 16:04:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:48,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824537427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:48,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:48,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-15 16:04:48,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767178964] [2022-03-15 16:04:48,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:48,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:04:48,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:48,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:04:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:04:48,641 INFO L87 Difference]: Start difference. First operand 1899 states and 6575 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:49,239 INFO L93 Difference]: Finished difference Result 2643 states and 8910 transitions. [2022-03-15 16:04:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:04:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:49,244 INFO L225 Difference]: With dead ends: 2643 [2022-03-15 16:04:49,244 INFO L226 Difference]: Without dead ends: 2626 [2022-03-15 16:04:49,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:04:49,244 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 173 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:49,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 355 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 613 Invalid, 0 Unknown, 592 Unchecked, 0.2s Time] [2022-03-15 16:04:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2022-03-15 16:04:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1897. [2022-03-15 16:04:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.4593881856540083) internal successors, (6559), 1896 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6559 transitions. [2022-03-15 16:04:49,267 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6559 transitions. Word has length 23 [2022-03-15 16:04:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:49,267 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 6559 transitions. [2022-03-15 16:04:49,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6559 transitions. [2022-03-15 16:04:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:49,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:49,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:49,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-15 16:04:49,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:49,470 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1844290479, now seen corresponding path program 277 times [2022-03-15 16:04:49,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:49,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224521763] [2022-03-15 16:04:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:49,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:49,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:49,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224521763] [2022-03-15 16:04:49,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224521763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:49,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512378811] [2022-03-15 16:04:49,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:04:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:49,585 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:49,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-15 16:04:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:49,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-03-15 16:04:50,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-03-15 16:04:50,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:50,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-03-15 16:04:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:50,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:50,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 259 [2022-03-15 16:04:51,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-15 16:04:51,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:51,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 200 [2022-03-15 16:04:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:51,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512378811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:51,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:51,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:04:51,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425742071] [2022-03-15 16:04:51,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:51,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:04:51,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:04:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:04:51,526 INFO L87 Difference]: Start difference. First operand 1897 states and 6559 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:51,740 INFO L93 Difference]: Finished difference Result 2139 states and 7223 transitions. [2022-03-15 16:04:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:04:51,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:51,744 INFO L225 Difference]: With dead ends: 2139 [2022-03-15 16:04:51,744 INFO L226 Difference]: Without dead ends: 2079 [2022-03-15 16:04:51,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:04:51,744 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:51,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 229 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 511 Invalid, 0 Unknown, 328 Unchecked, 0.2s Time] [2022-03-15 16:04:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-03-15 16:04:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1879. [2022-03-15 16:04:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4696485623003195) internal successors, (6516), 1878 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6516 transitions. [2022-03-15 16:04:51,765 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6516 transitions. Word has length 23 [2022-03-15 16:04:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:51,765 INFO L470 AbstractCegarLoop]: Abstraction has 1879 states and 6516 transitions. [2022-03-15 16:04:51,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6516 transitions. [2022-03-15 16:04:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:51,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:51,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:51,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:51,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:51,968 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1633248171, now seen corresponding path program 278 times [2022-03-15 16:04:51,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:51,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235061237] [2022-03-15 16:04:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:52,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:52,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235061237] [2022-03-15 16:04:52,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235061237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:52,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79047598] [2022-03-15 16:04:52,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:04:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:52,138 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:52,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-15 16:04:52,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:04:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:52,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-03-15 16:04:52,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:04:52,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:52,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 134 [2022-03-15 16:04:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:53,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:53,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-15 16:04:53,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 266 [2022-03-15 16:04:53,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:04:53,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 249 [2022-03-15 16:04:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:04:54,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79047598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:54,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:54,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:04:54,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880601651] [2022-03-15 16:04:54,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:54,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:04:54,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:04:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:04:54,187 INFO L87 Difference]: Start difference. First operand 1879 states and 6516 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:55,490 INFO L93 Difference]: Finished difference Result 2988 states and 9860 transitions. [2022-03-15 16:04:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:04:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:55,495 INFO L225 Difference]: With dead ends: 2988 [2022-03-15 16:04:55,495 INFO L226 Difference]: Without dead ends: 2755 [2022-03-15 16:04:55,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:04:55,495 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 259 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:55,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 417 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1195 Invalid, 0 Unknown, 205 Unchecked, 0.5s Time] [2022-03-15 16:04:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-03-15 16:04:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1980. [2022-03-15 16:04:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.5073269327943404) internal successors, (6941), 1979 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6941 transitions. [2022-03-15 16:04:55,521 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6941 transitions. Word has length 23 [2022-03-15 16:04:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:55,521 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6941 transitions. [2022-03-15 16:04:55,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6941 transitions. [2022-03-15 16:04:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:55,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:55,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:55,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:55,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2022-03-15 16:04:55,724 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash -216166955, now seen corresponding path program 279 times [2022-03-15 16:04:55,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:55,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026241950] [2022-03-15 16:04:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:55,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:55,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026241950] [2022-03-15 16:04:55,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026241950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:55,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673107333] [2022-03-15 16:04:55,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:04:55,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:55,906 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:55,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-15 16:04:56,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:04:56,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:56,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:56,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:56,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-03-15 16:04:56,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-15 16:04:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:04:56,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 16:04:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:56,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:04:57,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:04:57,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-03-15 16:04:57,559 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:04:57,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 239 [2022-03-15 16:04:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:04:57,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673107333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:04:57,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:04:57,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-15 16:04:57,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707972679] [2022-03-15 16:04:57,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:04:57,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:04:57,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:04:57,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:04:57,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:04:57,745 INFO L87 Difference]: Start difference. First operand 1980 states and 6941 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:04:59,090 INFO L93 Difference]: Finished difference Result 2696 states and 9229 transitions. [2022-03-15 16:04:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:04:59,090 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:04:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:04:59,095 INFO L225 Difference]: With dead ends: 2696 [2022-03-15 16:04:59,095 INFO L226 Difference]: Without dead ends: 2598 [2022-03-15 16:04:59,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=2241, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:04:59,096 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:04:59,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 598 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1278 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-03-15 16:04:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2022-03-15 16:04:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2008. [2022-03-15 16:04:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5226706527154956) internal successors, (7070), 2007 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7070 transitions. [2022-03-15 16:04:59,120 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7070 transitions. Word has length 23 [2022-03-15 16:04:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:04:59,120 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7070 transitions. [2022-03-15 16:04:59,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:04:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7070 transitions. [2022-03-15 16:04:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:04:59,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:04:59,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:04:59,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-03-15 16:04:59,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:59,323 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:04:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:04:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2141222643, now seen corresponding path program 280 times [2022-03-15 16:04:59,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:04:59,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227718234] [2022-03-15 16:04:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:04:59,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:04:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:04:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:04:59,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:04:59,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227718234] [2022-03-15 16:04:59,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227718234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:04:59,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138270952] [2022-03-15 16:04:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:04:59,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:04:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:04:59,502 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:04:59,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-15 16:04:59,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:04:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:04:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:04:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:04:59,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-03-15 16:05:00,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:00,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 240 [2022-03-15 16:05:00,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 208 [2022-03-15 16:05:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:00,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:00,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:05:01,305 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:05:01,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 267 [2022-03-15 16:05:01,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 221 [2022-03-15 16:05:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:01,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138270952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:01,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:01,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 16:05:01,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829902876] [2022-03-15 16:05:01,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:01,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:05:01,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:01,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:05:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:05:01,458 INFO L87 Difference]: Start difference. First operand 2008 states and 7070 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:02,283 INFO L93 Difference]: Finished difference Result 2805 states and 9744 transitions. [2022-03-15 16:05:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:05:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:02,288 INFO L225 Difference]: With dead ends: 2805 [2022-03-15 16:05:02,288 INFO L226 Difference]: Without dead ends: 2757 [2022-03-15 16:05:02,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:05:02,288 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 203 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:02,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 308 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 501 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-03-15 16:05:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2022-03-15 16:05:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2008. [2022-03-15 16:05:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.521674140508221) internal successors, (7068), 2007 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7068 transitions. [2022-03-15 16:05:02,314 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7068 transitions. Word has length 23 [2022-03-15 16:05:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:02,314 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7068 transitions. [2022-03-15 16:05:02,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7068 transitions. [2022-03-15 16:05:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:02,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:02,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:02,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-15 16:05:02,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-15 16:05:02,517 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -997922667, now seen corresponding path program 281 times [2022-03-15 16:05:02,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:02,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347815588] [2022-03-15 16:05:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:02,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:02,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347815588] [2022-03-15 16:05:02,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347815588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:02,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90841662] [2022-03-15 16:05:02,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:05:02,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:02,675 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:02,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-15 16:05:02,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:05:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:03,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-03-15 16:05:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:03,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 199 [2022-03-15 16:05:03,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 157 [2022-03-15 16:05:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:03,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:03,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-03-15 16:05:04,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-15 16:05:04,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:04,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 214 [2022-03-15 16:05:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:04,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90841662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:04,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:04,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:05:04,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248908121] [2022-03-15 16:05:04,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:04,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:04,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:04,506 INFO L87 Difference]: Start difference. First operand 2008 states and 7068 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:05,070 INFO L93 Difference]: Finished difference Result 2669 states and 8887 transitions. [2022-03-15 16:05:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:05:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:05,074 INFO L225 Difference]: With dead ends: 2669 [2022-03-15 16:05:05,074 INFO L226 Difference]: Without dead ends: 2518 [2022-03-15 16:05:05,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:05:05,075 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 205 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:05,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 340 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 863 Invalid, 0 Unknown, 334 Unchecked, 0.3s Time] [2022-03-15 16:05:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-03-15 16:05:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2050. [2022-03-15 16:05:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 3.5285505124450953) internal successors, (7230), 2049 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 7230 transitions. [2022-03-15 16:05:05,101 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 7230 transitions. Word has length 23 [2022-03-15 16:05:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:05,101 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 7230 transitions. [2022-03-15 16:05:05,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 7230 transitions. [2022-03-15 16:05:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:05,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:05,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:05,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-03-15 16:05:05,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-15 16:05:05,305 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash 118855181, now seen corresponding path program 282 times [2022-03-15 16:05:05,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:05,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697158214] [2022-03-15 16:05:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:05,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:05,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:05,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697158214] [2022-03-15 16:05:05,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697158214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:05,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109464247] [2022-03-15 16:05:05,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:05:05,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:05,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:05,449 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:05,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-15 16:05:05,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:05:05,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:05,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:05,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:05:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:06,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 244 [2022-03-15 16:05:06,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 190 [2022-03-15 16:05:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:06,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:06,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-03-15 16:05:07,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 239 [2022-03-15 16:05:07,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:07,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 222 [2022-03-15 16:05:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:07,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109464247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:07,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:07,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:05:07,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597482126] [2022-03-15 16:05:07,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:07,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:05:07,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:05:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:05:07,452 INFO L87 Difference]: Start difference. First operand 2050 states and 7230 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:07,718 INFO L93 Difference]: Finished difference Result 2426 states and 8274 transitions. [2022-03-15 16:05:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:05:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:07,722 INFO L225 Difference]: With dead ends: 2426 [2022-03-15 16:05:07,723 INFO L226 Difference]: Without dead ends: 2315 [2022-03-15 16:05:07,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:05:07,723 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:07,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 301 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-03-15 16:05:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-03-15 16:05:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2088. [2022-03-15 16:05:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 3.5232390991854334) internal successors, (7353), 2087 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 7353 transitions. [2022-03-15 16:05:07,746 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 7353 transitions. Word has length 23 [2022-03-15 16:05:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:07,746 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 7353 transitions. [2022-03-15 16:05:07,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 7353 transitions. [2022-03-15 16:05:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:07,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:07,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:07,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-15 16:05:07,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-15 16:05:07,950 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:07,950 INFO L85 PathProgramCache]: Analyzing trace with hash -799442709, now seen corresponding path program 283 times [2022-03-15 16:05:07,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:07,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255422265] [2022-03-15 16:05:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:07,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:08,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:08,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255422265] [2022-03-15 16:05:08,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255422265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:08,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263520190] [2022-03-15 16:05:08,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:05:08,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:08,209 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:08,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-15 16:05:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:08,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 183 [2022-03-15 16:05:09,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:05:09,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:09,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:05:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:09,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:09,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-03-15 16:05:09,969 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:05:09,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 284 [2022-03-15 16:05:09,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 230 [2022-03-15 16:05:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:10,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263520190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:10,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:10,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-03-15 16:05:10,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332646668] [2022-03-15 16:05:10,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:10,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:05:10,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:05:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:05:10,150 INFO L87 Difference]: Start difference. First operand 2088 states and 7353 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:11,261 INFO L93 Difference]: Finished difference Result 2956 states and 10025 transitions. [2022-03-15 16:05:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:05:11,261 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:11,266 INFO L225 Difference]: With dead ends: 2956 [2022-03-15 16:05:11,266 INFO L226 Difference]: Without dead ends: 2852 [2022-03-15 16:05:11,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:05:11,266 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 143 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:11,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 698 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1083 Invalid, 0 Unknown, 321 Unchecked, 0.4s Time] [2022-03-15 16:05:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2022-03-15 16:05:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2156. [2022-03-15 16:05:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.520185614849188) internal successors, (7586), 2155 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7586 transitions. [2022-03-15 16:05:11,294 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7586 transitions. Word has length 23 [2022-03-15 16:05:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:11,294 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 7586 transitions. [2022-03-15 16:05:11,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7586 transitions. [2022-03-15 16:05:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:11,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:11,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:11,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-15 16:05:11,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-15 16:05:11,497 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:11,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1951278285, now seen corresponding path program 284 times [2022-03-15 16:05:11,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:11,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427076207] [2022-03-15 16:05:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:11,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:11,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:11,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427076207] [2022-03-15 16:05:11,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427076207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:11,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753958370] [2022-03-15 16:05:11,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:05:11,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:11,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:11,628 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:11,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-15 16:05:11,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:05:11,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:11,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:11,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:12,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-03-15 16:05:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:12,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 180 [2022-03-15 16:05:12,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-15 16:05:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:12,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:12,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 194 [2022-03-15 16:05:13,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-03-15 16:05:13,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:13,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 192 [2022-03-15 16:05:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:13,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753958370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:13,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:13,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:05:13,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931367744] [2022-03-15 16:05:13,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:13,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:13,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:13,587 INFO L87 Difference]: Start difference. First operand 2156 states and 7586 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:17,309 INFO L93 Difference]: Finished difference Result 3932 states and 12821 transitions. [2022-03-15 16:05:17,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:05:17,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:17,315 INFO L225 Difference]: With dead ends: 3932 [2022-03-15 16:05:17,315 INFO L226 Difference]: Without dead ends: 3627 [2022-03-15 16:05:17,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=566, Invalid=5286, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:05:17,316 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 311 mSDsluCounter, 2622 mSDsCounter, 0 mSdLazyCounter, 3669 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:17,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1188 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3669 Invalid, 0 Unknown, 183 Unchecked, 1.4s Time] [2022-03-15 16:05:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-03-15 16:05:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1818. [2022-03-15 16:05:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.7171161254815632) internal successors, (6754), 1817 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6754 transitions. [2022-03-15 16:05:17,344 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6754 transitions. Word has length 23 [2022-03-15 16:05:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6754 transitions. [2022-03-15 16:05:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6754 transitions. [2022-03-15 16:05:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:17,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:17,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:17,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-15 16:05:17,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-03-15 16:05:17,547 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:17,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1919523695, now seen corresponding path program 285 times [2022-03-15 16:05:17,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:17,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47657307] [2022-03-15 16:05:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:17,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:17,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47657307] [2022-03-15 16:05:17,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47657307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:17,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748601149] [2022-03-15 16:05:17,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:05:17,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:17,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:17,744 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:17,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-15 16:05:18,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:05:18,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:18,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 188 [2022-03-15 16:05:18,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 286 [2022-03-15 16:05:18,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:18,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 264 [2022-03-15 16:05:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:19,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:19,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-03-15 16:05:19,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:19,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 292 [2022-03-15 16:05:19,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 221 [2022-03-15 16:05:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:05:19,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748601149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:19,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:19,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:05:20,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957018359] [2022-03-15 16:05:20,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:20,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:20,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:20,000 INFO L87 Difference]: Start difference. First operand 1818 states and 6754 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:25,038 INFO L93 Difference]: Finished difference Result 3624 states and 12109 transitions. [2022-03-15 16:05:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 16:05:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:25,044 INFO L225 Difference]: With dead ends: 3624 [2022-03-15 16:05:25,044 INFO L226 Difference]: Without dead ends: 3253 [2022-03-15 16:05:25,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3987 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1219, Invalid=10771, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 16:05:25,045 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 417 mSDsluCounter, 2488 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 3642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:25,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1316 Invalid, 3642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3092 Invalid, 0 Unknown, 356 Unchecked, 1.3s Time] [2022-03-15 16:05:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2022-03-15 16:05:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 2004. [2022-03-15 16:05:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.7219171243135296) internal successors, (7455), 2003 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7455 transitions. [2022-03-15 16:05:25,092 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7455 transitions. Word has length 23 [2022-03-15 16:05:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:25,092 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 7455 transitions. [2022-03-15 16:05:25,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7455 transitions. [2022-03-15 16:05:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:25,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:25,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:25,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-03-15 16:05:25,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-03-15 16:05:25,295 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash 160947901, now seen corresponding path program 286 times [2022-03-15 16:05:25,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:25,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258194667] [2022-03-15 16:05:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:25,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:25,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:25,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258194667] [2022-03-15 16:05:25,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258194667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:25,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307434485] [2022-03-15 16:05:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:05:25,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:25,423 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:25,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-15 16:05:25,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:05:25,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:05:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:25,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 251 [2022-03-15 16:05:26,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-03-15 16:05:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:26,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 180 [2022-03-15 16:05:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:26,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:26,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 277 [2022-03-15 16:05:27,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-15 16:05:27,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:27,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 164 [2022-03-15 16:05:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:27,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307434485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:27,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:27,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:05:27,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051077959] [2022-03-15 16:05:27,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:27,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:05:27,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:27,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:05:27,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:05:27,595 INFO L87 Difference]: Start difference. First operand 2004 states and 7455 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:28,377 INFO L93 Difference]: Finished difference Result 2738 states and 9602 transitions. [2022-03-15 16:05:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:05:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:28,382 INFO L225 Difference]: With dead ends: 2738 [2022-03-15 16:05:28,382 INFO L226 Difference]: Without dead ends: 2605 [2022-03-15 16:05:28,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:05:28,382 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:28,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 341 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:05:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-03-15 16:05:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1987. [2022-03-15 16:05:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.727593152064451) internal successors, (7403), 1986 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 7403 transitions. [2022-03-15 16:05:28,423 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 7403 transitions. Word has length 23 [2022-03-15 16:05:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:28,423 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 7403 transitions. [2022-03-15 16:05:28,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 7403 transitions. [2022-03-15 16:05:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:28,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:28,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:28,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-03-15 16:05:28,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-15 16:05:28,626 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1108816465, now seen corresponding path program 287 times [2022-03-15 16:05:28,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:28,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275287533] [2022-03-15 16:05:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:28,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:28,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:28,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275287533] [2022-03-15 16:05:28,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275287533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:28,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860996065] [2022-03-15 16:05:28,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:05:28,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:28,837 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:28,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-15 16:05:29,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:05:29,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:29,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:05:29,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:29,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 196 [2022-03-15 16:05:29,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:29,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 164 [2022-03-15 16:05:29,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-03-15 16:05:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:29,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:30,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-03-15 16:05:30,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:05:30,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:30,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 143 [2022-03-15 16:05:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:30,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860996065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:30,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:30,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-15 16:05:30,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825879154] [2022-03-15 16:05:30,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:30,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:30,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:30,757 INFO L87 Difference]: Start difference. First operand 1987 states and 7403 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:32,879 INFO L93 Difference]: Finished difference Result 3578 states and 12230 transitions. [2022-03-15 16:05:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:05:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:32,885 INFO L225 Difference]: With dead ends: 3578 [2022-03-15 16:05:32,885 INFO L226 Difference]: Without dead ends: 3330 [2022-03-15 16:05:32,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=381, Invalid=2481, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:05:32,886 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 303 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:32,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 511 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:05:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-03-15 16:05:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2089. [2022-03-15 16:05:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.7863984674329503) internal successors, (7906), 2088 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7906 transitions. [2022-03-15 16:05:32,915 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7906 transitions. Word has length 23 [2022-03-15 16:05:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:32,915 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 7906 transitions. [2022-03-15 16:05:32,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7906 transitions. [2022-03-15 16:05:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:32,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:32,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:32,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-15 16:05:33,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:33,119 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1863026185, now seen corresponding path program 288 times [2022-03-15 16:05:33,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:33,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156079896] [2022-03-15 16:05:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:33,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:33,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:33,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156079896] [2022-03-15 16:05:33,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156079896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:33,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069272164] [2022-03-15 16:05:33,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:05:33,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:33,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:33,335 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:33,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-15 16:05:33,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:05:33,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:33,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:33,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-03-15 16:05:34,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-15 16:05:34,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:34,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 16:05:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:34,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:34,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-03-15 16:05:34,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:34,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 177 [2022-03-15 16:05:34,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-15 16:05:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:35,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069272164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:35,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:35,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 16:05:35,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713887204] [2022-03-15 16:05:35,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:35,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:05:35,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:05:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:05:35,216 INFO L87 Difference]: Start difference. First operand 2089 states and 7906 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:39,053 INFO L93 Difference]: Finished difference Result 3595 states and 12374 transitions. [2022-03-15 16:05:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:05:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:39,060 INFO L225 Difference]: With dead ends: 3595 [2022-03-15 16:05:39,060 INFO L226 Difference]: Without dead ends: 3426 [2022-03-15 16:05:39,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=816, Invalid=6324, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:05:39,061 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 355 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:39,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1158 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3206 Invalid, 0 Unknown, 272 Unchecked, 1.3s Time] [2022-03-15 16:05:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2022-03-15 16:05:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 2156. [2022-03-15 16:05:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.810672853828306) internal successors, (8212), 2155 states have internal predecessors, (8212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 8212 transitions. [2022-03-15 16:05:39,095 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 8212 transitions. Word has length 23 [2022-03-15 16:05:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:39,095 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 8212 transitions. [2022-03-15 16:05:39,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 8212 transitions. [2022-03-15 16:05:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:39,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:39,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:39,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-03-15 16:05:39,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2022-03-15 16:05:39,298 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1304107393, now seen corresponding path program 289 times [2022-03-15 16:05:39,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:39,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282964759] [2022-03-15 16:05:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:39,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:39,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:39,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282964759] [2022-03-15 16:05:39,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282964759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:39,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671510348] [2022-03-15 16:05:39,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:05:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:39,440 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:39,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-15 16:05:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:39,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:39,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:05:40,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-15 16:05:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:40,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:05:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:40,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:40,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:05:41,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 390 treesize of output 330 [2022-03-15 16:05:41,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:41,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 307 [2022-03-15 16:05:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:41,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671510348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:41,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:41,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:05:41,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912988292] [2022-03-15 16:05:41,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:41,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:41,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:41,485 INFO L87 Difference]: Start difference. First operand 2156 states and 8212 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:45,358 INFO L93 Difference]: Finished difference Result 4203 states and 14028 transitions. [2022-03-15 16:05:45,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 16:05:45,359 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:45,365 INFO L225 Difference]: With dead ends: 4203 [2022-03-15 16:05:45,365 INFO L226 Difference]: Without dead ends: 3828 [2022-03-15 16:05:45,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=768, Invalid=7242, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:05:45,366 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 377 mSDsluCounter, 2383 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:45,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1292 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2723 Invalid, 0 Unknown, 664 Unchecked, 1.1s Time] [2022-03-15 16:05:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2022-03-15 16:05:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2155. [2022-03-15 16:05:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.7920148560817086) internal successors, (8168), 2154 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 8168 transitions. [2022-03-15 16:05:45,400 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 8168 transitions. Word has length 23 [2022-03-15 16:05:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:45,400 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 8168 transitions. [2022-03-15 16:05:45,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 8168 transitions. [2022-03-15 16:05:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:45,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:45,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:45,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-03-15 16:05:45,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:45,603 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash 874469363, now seen corresponding path program 290 times [2022-03-15 16:05:45,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:45,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141955199] [2022-03-15 16:05:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:45,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:45,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141955199] [2022-03-15 16:05:45,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141955199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:45,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967194718] [2022-03-15 16:05:45,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:05:45,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:45,723 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:45,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-15 16:05:46,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:05:46,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:46,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-15 16:05:46,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 227 [2022-03-15 16:05:46,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:46,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 213 [2022-03-15 16:05:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:46,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:47,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:05:47,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 285 [2022-03-15 16:05:47,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:47,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 262 [2022-03-15 16:05:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:47,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967194718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:47,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:47,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:05:47,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671909361] [2022-03-15 16:05:47,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:47,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:47,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:47,814 INFO L87 Difference]: Start difference. First operand 2155 states and 8168 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:49,839 INFO L93 Difference]: Finished difference Result 3478 states and 11927 transitions. [2022-03-15 16:05:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:05:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:49,845 INFO L225 Difference]: With dead ends: 3478 [2022-03-15 16:05:49,845 INFO L226 Difference]: Without dead ends: 3288 [2022-03-15 16:05:49,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=359, Invalid=3931, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:05:49,845 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 205 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:49,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1077 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2690 Invalid, 0 Unknown, 407 Unchecked, 1.0s Time] [2022-03-15 16:05:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-03-15 16:05:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2082. [2022-03-15 16:05:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 3.7775108121095626) internal successors, (7861), 2081 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 7861 transitions. [2022-03-15 16:05:49,874 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 7861 transitions. Word has length 23 [2022-03-15 16:05:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:49,875 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 7861 transitions. [2022-03-15 16:05:49,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 7861 transitions. [2022-03-15 16:05:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:49,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:49,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:49,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-15 16:05:50,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:50,078 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash -28660117, now seen corresponding path program 291 times [2022-03-15 16:05:50,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:50,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164521086] [2022-03-15 16:05:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:50,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:50,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:50,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164521086] [2022-03-15 16:05:50,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164521086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:50,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867014131] [2022-03-15 16:05:50,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:05:50,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:50,225 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:50,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-15 16:05:50,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:05:50,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:50,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 244 [2022-03-15 16:05:50,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:05:50,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:50,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:05:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:51,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:51,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-03-15 16:05:51,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:51,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 266 [2022-03-15 16:05:51,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 194 [2022-03-15 16:05:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:52,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867014131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:52,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:52,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-15 16:05:52,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429089668] [2022-03-15 16:05:52,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:52,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:05:52,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:52,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:05:52,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:05:52,119 INFO L87 Difference]: Start difference. First operand 2082 states and 7861 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:53,920 INFO L93 Difference]: Finished difference Result 2970 states and 10786 transitions. [2022-03-15 16:05:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:05:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:53,925 INFO L225 Difference]: With dead ends: 2970 [2022-03-15 16:05:53,926 INFO L226 Difference]: Without dead ends: 2764 [2022-03-15 16:05:53,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:05:53,926 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:53,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 564 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1797 Invalid, 0 Unknown, 97 Unchecked, 0.7s Time] [2022-03-15 16:05:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-03-15 16:05:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2164. [2022-03-15 16:05:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 3.8187702265372168) internal successors, (8260), 2163 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 8260 transitions. [2022-03-15 16:05:53,974 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 8260 transitions. Word has length 23 [2022-03-15 16:05:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:53,974 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 8260 transitions. [2022-03-15 16:05:53,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 8260 transitions. [2022-03-15 16:05:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:53,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:53,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:53,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-03-15 16:05:54,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-03-15 16:05:54,178 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:54,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1491034655, now seen corresponding path program 292 times [2022-03-15 16:05:54,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:54,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091248417] [2022-03-15 16:05:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:54,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:54,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:54,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091248417] [2022-03-15 16:05:54,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091248417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:54,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645847964] [2022-03-15 16:05:54,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:05:54,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:54,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:54,349 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:54,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-15 16:05:54,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:05:54,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:54,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 150 [2022-03-15 16:05:54,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-15 16:05:54,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 141 [2022-03-15 16:05:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:55,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:05:56,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:56,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 300 [2022-03-15 16:05:56,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 236 [2022-03-15 16:05:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:05:56,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645847964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:56,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:56,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-03-15 16:05:56,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769347865] [2022-03-15 16:05:56,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:56,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:56,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:56,277 INFO L87 Difference]: Start difference. First operand 2164 states and 8260 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:05:57,184 INFO L93 Difference]: Finished difference Result 2992 states and 10795 transitions. [2022-03-15 16:05:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:05:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:05:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:05:57,189 INFO L225 Difference]: With dead ends: 2992 [2022-03-15 16:05:57,189 INFO L226 Difference]: Without dead ends: 2845 [2022-03-15 16:05:57,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:05:57,190 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 189 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:05:57,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 336 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:05:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-03-15 16:05:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2215. [2022-03-15 16:05:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 3.832429990966576) internal successors, (8485), 2214 states have internal predecessors, (8485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 8485 transitions. [2022-03-15 16:05:57,220 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 8485 transitions. Word has length 23 [2022-03-15 16:05:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:05:57,220 INFO L470 AbstractCegarLoop]: Abstraction has 2215 states and 8485 transitions. [2022-03-15 16:05:57,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:05:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 8485 transitions. [2022-03-15 16:05:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:05:57,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:05:57,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:05:57,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-03-15 16:05:57,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:57,424 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:05:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:05:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1203444595, now seen corresponding path program 293 times [2022-03-15 16:05:57,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:05:57,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771155492] [2022-03-15 16:05:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:05:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:05:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:05:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:57,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:05:57,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771155492] [2022-03-15 16:05:57,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771155492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:05:57,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473325318] [2022-03-15 16:05:57,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:05:57,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:05:57,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:05:57,560 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:05:57,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-15 16:05:57,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:05:57,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:05:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:05:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:05:58,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-03-15 16:05:58,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:05:58,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 240 [2022-03-15 16:05:58,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 180 [2022-03-15 16:05:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:58,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:05:59,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-15 16:05:59,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-03-15 16:05:59,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:05:59,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 262 [2022-03-15 16:05:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:05:59,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473325318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:05:59,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:05:59,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:05:59,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750577687] [2022-03-15 16:05:59,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:05:59,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:05:59,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:05:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:05:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:05:59,699 INFO L87 Difference]: Start difference. First operand 2215 states and 8485 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:03,401 INFO L93 Difference]: Finished difference Result 3510 states and 12421 transitions. [2022-03-15 16:06:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:06:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:03,407 INFO L225 Difference]: With dead ends: 3510 [2022-03-15 16:06:03,407 INFO L226 Difference]: Without dead ends: 3344 [2022-03-15 16:06:03,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=681, Invalid=5639, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:06:03,408 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 348 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:03,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 718 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2112 Invalid, 0 Unknown, 419 Unchecked, 0.9s Time] [2022-03-15 16:06:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-03-15 16:06:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 2288. [2022-03-15 16:06:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.8447748141670313) internal successors, (8793), 2287 states have internal predecessors, (8793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8793 transitions. [2022-03-15 16:06:03,441 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8793 transitions. Word has length 23 [2022-03-15 16:06:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:03,441 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 8793 transitions. [2022-03-15 16:06:03,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8793 transitions. [2022-03-15 16:06:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:03,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:03,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:03,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-03-15 16:06:03,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-15 16:06:03,645 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1736534693, now seen corresponding path program 294 times [2022-03-15 16:06:03,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:03,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244586397] [2022-03-15 16:06:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:03,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:03,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244586397] [2022-03-15 16:06:03,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244586397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827444168] [2022-03-15 16:06:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:06:03,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:03,781 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:03,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-15 16:06:04,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:06:04,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:06:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:04,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-03-15 16:06:04,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-03-15 16:06:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:04,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 174 [2022-03-15 16:06:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:05,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:05,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-03-15 16:06:05,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-15 16:06:05,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:05,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 212 [2022-03-15 16:06:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:05,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827444168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:05,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:05,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:06:05,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372194753] [2022-03-15 16:06:05,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:06:05,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:06:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:06:05,896 INFO L87 Difference]: Start difference. First operand 2288 states and 8793 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:08,855 INFO L93 Difference]: Finished difference Result 3808 states and 13029 transitions. [2022-03-15 16:06:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:06:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:08,862 INFO L225 Difference]: With dead ends: 3808 [2022-03-15 16:06:08,862 INFO L226 Difference]: Without dead ends: 3543 [2022-03-15 16:06:08,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=507, Invalid=5345, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:06:08,863 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 319 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:08,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 978 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2545 Invalid, 0 Unknown, 309 Unchecked, 1.0s Time] [2022-03-15 16:06:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-03-15 16:06:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2322. [2022-03-15 16:06:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 3.838862559241706) internal successors, (8910), 2321 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 8910 transitions. [2022-03-15 16:06:08,901 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 8910 transitions. Word has length 23 [2022-03-15 16:06:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:08,901 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 8910 transitions. [2022-03-15 16:06:08,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 8910 transitions. [2022-03-15 16:06:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:08,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:08,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:08,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-03-15 16:06:09,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-15 16:06:09,104 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:09,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1384159003, now seen corresponding path program 295 times [2022-03-15 16:06:09,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:09,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506697908] [2022-03-15 16:06:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:09,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:09,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:09,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506697908] [2022-03-15 16:06:09,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506697908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:09,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489577479] [2022-03-15 16:06:09,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:06:09,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:09,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:09,220 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:09,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-15 16:06:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:06:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:09,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 242 [2022-03-15 16:06:10,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:06:10,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:10,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-15 16:06:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:10,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:10,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 230 [2022-03-15 16:06:11,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-03-15 16:06:11,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:11,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 213 [2022-03-15 16:06:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:11,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489577479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:11,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:11,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:06:11,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066330616] [2022-03-15 16:06:11,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:11,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:06:11,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:06:11,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:06:11,412 INFO L87 Difference]: Start difference. First operand 2322 states and 8910 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:14,565 INFO L93 Difference]: Finished difference Result 3899 states and 13323 transitions. [2022-03-15 16:06:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:06:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:14,572 INFO L225 Difference]: With dead ends: 3899 [2022-03-15 16:06:14,572 INFO L226 Difference]: Without dead ends: 3400 [2022-03-15 16:06:14,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=571, Invalid=5749, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:06:14,573 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 241 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:14,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1032 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2863 Invalid, 0 Unknown, 378 Unchecked, 1.1s Time] [2022-03-15 16:06:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-03-15 16:06:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2323. [2022-03-15 16:06:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.8238587424633934) internal successors, (8879), 2322 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 8879 transitions. [2022-03-15 16:06:14,606 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 8879 transitions. Word has length 23 [2022-03-15 16:06:14,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:14,606 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 8879 transitions. [2022-03-15 16:06:14,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 8879 transitions. [2022-03-15 16:06:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:14,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:14,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:14,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-15 16:06:14,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:14,810 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:14,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash -468315819, now seen corresponding path program 296 times [2022-03-15 16:06:14,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:14,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825794297] [2022-03-15 16:06:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:15,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:15,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825794297] [2022-03-15 16:06:15,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825794297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:15,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945899036] [2022-03-15 16:06:15,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:06:15,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:15,020 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:15,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-15 16:06:15,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:06:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:15,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:06:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:15,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 302 [2022-03-15 16:06:15,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-03-15 16:06:15,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:15,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-15 16:06:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:16,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:16,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-15 16:06:16,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:16,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 188 [2022-03-15 16:06:16,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-03-15 16:06:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:16,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945899036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:16,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:16,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-03-15 16:06:16,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797149963] [2022-03-15 16:06:16,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:16,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:06:16,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:16,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:06:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:06:16,957 INFO L87 Difference]: Start difference. First operand 2323 states and 8879 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:18,508 INFO L93 Difference]: Finished difference Result 3850 states and 13654 transitions. [2022-03-15 16:06:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:06:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:18,515 INFO L225 Difference]: With dead ends: 3850 [2022-03-15 16:06:18,516 INFO L226 Difference]: Without dead ends: 3636 [2022-03-15 16:06:18,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=2414, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:06:18,516 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 291 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:18,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 398 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:06:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2022-03-15 16:06:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2444. [2022-03-15 16:06:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.880474826033565) internal successors, (9480), 2443 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 9480 transitions. [2022-03-15 16:06:18,552 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 9480 transitions. Word has length 23 [2022-03-15 16:06:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:18,552 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 9480 transitions. [2022-03-15 16:06:18,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 9480 transitions. [2022-03-15 16:06:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:18,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:18,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:18,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-03-15 16:06:18,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:18,756 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash -313878301, now seen corresponding path program 297 times [2022-03-15 16:06:18,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:18,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273440520] [2022-03-15 16:06:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:18,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:18,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273440520] [2022-03-15 16:06:18,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273440520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:18,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027933865] [2022-03-15 16:06:18,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:06:18,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:18,943 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:18,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-15 16:06:19,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:06:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:19,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:06:19,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:19,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:06:19,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:19,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-03-15 16:06:19,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-03-15 16:06:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:20,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:20,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-15 16:06:20,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-15 16:06:20,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:20,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 146 [2022-03-15 16:06:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:21,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027933865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:21,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:21,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-15 16:06:21,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965605926] [2022-03-15 16:06:21,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:21,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:06:21,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:06:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:06:21,076 INFO L87 Difference]: Start difference. First operand 2444 states and 9480 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:22,478 INFO L93 Difference]: Finished difference Result 3516 states and 12608 transitions. [2022-03-15 16:06:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:06:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:22,484 INFO L225 Difference]: With dead ends: 3516 [2022-03-15 16:06:22,484 INFO L226 Difference]: Without dead ends: 3296 [2022-03-15 16:06:22,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:06:22,484 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:22,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 496 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:06:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2022-03-15 16:06:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2454. [2022-03-15 16:06:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 3.8630248675091723) internal successors, (9476), 2453 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 9476 transitions. [2022-03-15 16:06:22,516 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 9476 transitions. Word has length 23 [2022-03-15 16:06:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:22,516 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 9476 transitions. [2022-03-15 16:06:22,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 9476 transitions. [2022-03-15 16:06:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:22,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:22,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:22,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-03-15 16:06:22,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:22,720 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1422141247, now seen corresponding path program 298 times [2022-03-15 16:06:22,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:22,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514344227] [2022-03-15 16:06:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:22,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:22,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514344227] [2022-03-15 16:06:22,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514344227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:22,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708577316] [2022-03-15 16:06:22,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:06:22,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:22,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:22,980 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:22,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-15 16:06:23,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:06:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:06:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:23,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 234 [2022-03-15 16:06:23,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 264 [2022-03-15 16:06:23,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:23,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 243 [2022-03-15 16:06:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:24,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:24,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 209 [2022-03-15 16:06:25,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:25,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-03-15 16:06:25,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-03-15 16:06:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:25,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708577316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:25,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:25,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-03-15 16:06:25,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448866512] [2022-03-15 16:06:25,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:25,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:06:25,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:06:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:06:25,393 INFO L87 Difference]: Start difference. First operand 2454 states and 9476 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:29,651 INFO L93 Difference]: Finished difference Result 4808 states and 16488 transitions. [2022-03-15 16:06:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:06:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:29,660 INFO L225 Difference]: With dead ends: 4808 [2022-03-15 16:06:29,660 INFO L226 Difference]: Without dead ends: 4431 [2022-03-15 16:06:29,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=696, Invalid=6110, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 16:06:29,660 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 300 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:29,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 924 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:06:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2022-03-15 16:06:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2595. [2022-03-15 16:06:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2594 states have (on average 3.9136468774094064) internal successors, (10152), 2594 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 10152 transitions. [2022-03-15 16:06:29,702 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 10152 transitions. Word has length 23 [2022-03-15 16:06:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 2595 states and 10152 transitions. [2022-03-15 16:06:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 10152 transitions. [2022-03-15 16:06:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:29,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:29,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:29,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-03-15 16:06:29,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:29,906 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1254181529, now seen corresponding path program 299 times [2022-03-15 16:06:29,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:29,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553334648] [2022-03-15 16:06:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:30,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:30,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553334648] [2022-03-15 16:06:30,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553334648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:30,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101332974] [2022-03-15 16:06:30,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:06:30,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:30,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:30,039 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:30,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-15 16:06:30,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:06:30,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:06:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:30,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-03-15 16:06:30,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:30,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 172 [2022-03-15 16:06:30,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 132 [2022-03-15 16:06:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:31,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:31,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-03-15 16:06:31,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:31,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 190 [2022-03-15 16:06:31,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-03-15 16:06:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:31,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101332974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:31,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:31,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:06:31,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523305456] [2022-03-15 16:06:31,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:31,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:06:31,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:31,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:06:31,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:06:31,985 INFO L87 Difference]: Start difference. First operand 2595 states and 10152 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:32,391 INFO L93 Difference]: Finished difference Result 3371 states and 12525 transitions. [2022-03-15 16:06:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:06:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:32,398 INFO L225 Difference]: With dead ends: 3371 [2022-03-15 16:06:32,398 INFO L226 Difference]: Without dead ends: 3231 [2022-03-15 16:06:32,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:06:32,398 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:32,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 257 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 666 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-03-15 16:06:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2022-03-15 16:06:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 2688. [2022-03-15 16:06:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 3.9077037588388537) internal successors, (10500), 2687 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 10500 transitions. [2022-03-15 16:06:32,434 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 10500 transitions. Word has length 23 [2022-03-15 16:06:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:32,435 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 10500 transitions. [2022-03-15 16:06:32,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 10500 transitions. [2022-03-15 16:06:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:32,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:32,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:32,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-03-15 16:06:32,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:32,639 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:32,639 INFO L85 PathProgramCache]: Analyzing trace with hash 399571401, now seen corresponding path program 300 times [2022-03-15 16:06:32,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:32,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556182160] [2022-03-15 16:06:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:32,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:32,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:32,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556182160] [2022-03-15 16:06:32,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556182160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:32,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587904264] [2022-03-15 16:06:32,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:06:32,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:32,805 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:32,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-15 16:06:33,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:06:33,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:06:33,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:33,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-15 16:06:33,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:33,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 282 [2022-03-15 16:06:33,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 232 [2022-03-15 16:06:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:34,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:34,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-03-15 16:06:34,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 285 [2022-03-15 16:06:34,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:34,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 260 [2022-03-15 16:06:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:34,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587904264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:34,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:34,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-03-15 16:06:34,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918197923] [2022-03-15 16:06:34,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:34,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:06:34,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:06:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:06:34,996 INFO L87 Difference]: Start difference. First operand 2688 states and 10500 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:35,456 INFO L93 Difference]: Finished difference Result 3331 states and 12478 transitions. [2022-03-15 16:06:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:06:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:35,462 INFO L225 Difference]: With dead ends: 3331 [2022-03-15 16:06:35,462 INFO L226 Difference]: Without dead ends: 3229 [2022-03-15 16:06:35,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:06:35,463 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:35,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 305 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 770 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-03-15 16:06:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-03-15 16:06:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2645. [2022-03-15 16:06:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.9156580937972767) internal successors, (10353), 2644 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 10353 transitions. [2022-03-15 16:06:35,498 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 10353 transitions. Word has length 23 [2022-03-15 16:06:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:35,498 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 10353 transitions. [2022-03-15 16:06:35,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 10353 transitions. [2022-03-15 16:06:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:35,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:35,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:35,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-03-15 16:06:35,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:35,702 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2102661045, now seen corresponding path program 301 times [2022-03-15 16:06:35,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:35,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765261819] [2022-03-15 16:06:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:35,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:35,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:35,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765261819] [2022-03-15 16:06:35,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765261819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:35,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044528488] [2022-03-15 16:06:35,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:06:35,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:35,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:35,815 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:35,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-15 16:06:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:06:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:36,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-03-15 16:06:36,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:36,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 234 [2022-03-15 16:06:36,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 191 [2022-03-15 16:06:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:37,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:37,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 390 treesize of output 350 [2022-03-15 16:06:37,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 243 [2022-03-15 16:06:37,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:37,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 228 [2022-03-15 16:06:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:38,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044528488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:38,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:38,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:06:38,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816638622] [2022-03-15 16:06:38,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:38,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:06:38,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:06:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:06:38,298 INFO L87 Difference]: Start difference. First operand 2645 states and 10353 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:40,867 INFO L93 Difference]: Finished difference Result 3926 states and 13719 transitions. [2022-03-15 16:06:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:06:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:40,875 INFO L225 Difference]: With dead ends: 3926 [2022-03-15 16:06:40,875 INFO L226 Difference]: Without dead ends: 3458 [2022-03-15 16:06:40,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=473, Invalid=4219, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:06:40,876 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 216 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:40,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1045 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2012 Invalid, 0 Unknown, 891 Unchecked, 0.8s Time] [2022-03-15 16:06:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2022-03-15 16:06:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 2712. [2022-03-15 16:06:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 3.8911840649206937) internal successors, (10549), 2711 states have internal predecessors, (10549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 10549 transitions. [2022-03-15 16:06:40,942 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 10549 transitions. Word has length 23 [2022-03-15 16:06:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:40,942 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 10549 transitions. [2022-03-15 16:06:40,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 10549 transitions. [2022-03-15 16:06:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:40,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:40,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:40,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-03-15 16:06:41,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-03-15 16:06:41,146 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1215499983, now seen corresponding path program 302 times [2022-03-15 16:06:41,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:41,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32893252] [2022-03-15 16:06:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:41,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:41,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:41,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32893252] [2022-03-15 16:06:41,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32893252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:41,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439122045] [2022-03-15 16:06:41,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:06:41,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:41,326 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-15 16:06:41,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:06:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:06:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:41,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-03-15 16:06:42,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-15 16:06:42,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:42,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-15 16:06:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:42,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:42,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 207 [2022-03-15 16:06:43,145 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:06:43,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 248 [2022-03-15 16:06:43,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 194 [2022-03-15 16:06:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:43,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439122045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:43,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:43,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-15 16:06:43,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272674025] [2022-03-15 16:06:43,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:43,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:06:43,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:06:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:06:43,302 INFO L87 Difference]: Start difference. First operand 2712 states and 10549 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:44,866 INFO L93 Difference]: Finished difference Result 3699 states and 13779 transitions. [2022-03-15 16:06:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:06:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:44,873 INFO L225 Difference]: With dead ends: 3699 [2022-03-15 16:06:44,873 INFO L226 Difference]: Without dead ends: 3589 [2022-03-15 16:06:44,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=2627, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:06:44,874 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:44,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 635 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1480 Invalid, 0 Unknown, 361 Unchecked, 0.6s Time] [2022-03-15 16:06:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-03-15 16:06:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2713. [2022-03-15 16:06:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 3.8934365781710913) internal successors, (10559), 2712 states have internal predecessors, (10559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 10559 transitions. [2022-03-15 16:06:44,912 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 10559 transitions. Word has length 23 [2022-03-15 16:06:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:44,912 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 10559 transitions. [2022-03-15 16:06:44,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 10559 transitions. [2022-03-15 16:06:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:44,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:44,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:44,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-15 16:06:45,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:45,117 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1141889615, now seen corresponding path program 303 times [2022-03-15 16:06:45,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:45,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334844635] [2022-03-15 16:06:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:45,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:45,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334844635] [2022-03-15 16:06:45,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334844635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:45,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591276787] [2022-03-15 16:06:45,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:06:45,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:45,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:45,303 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:45,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-15 16:06:45,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:06:45,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:45,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:06:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:45,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 186 [2022-03-15 16:06:46,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:46,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 260 [2022-03-15 16:06:46,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-03-15 16:06:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:46,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:46,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-03-15 16:06:47,242 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:06:47,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 224 [2022-03-15 16:06:47,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-03-15 16:06:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:47,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591276787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:47,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:47,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-15 16:06:47,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149639980] [2022-03-15 16:06:47,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:47,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:06:47,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:47,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:06:47,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:06:47,380 INFO L87 Difference]: Start difference. First operand 2713 states and 10559 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:49,081 INFO L93 Difference]: Finished difference Result 3636 states and 13524 transitions. [2022-03-15 16:06:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:06:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:49,088 INFO L225 Difference]: With dead ends: 3636 [2022-03-15 16:06:49,088 INFO L226 Difference]: Without dead ends: 3556 [2022-03-15 16:06:49,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:06:49,089 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 128 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:49,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 700 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1760 Invalid, 0 Unknown, 110 Unchecked, 0.7s Time] [2022-03-15 16:06:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2022-03-15 16:06:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2715. [2022-03-15 16:06:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 3.8942520265291085) internal successors, (10569), 2714 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 10569 transitions. [2022-03-15 16:06:49,127 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 10569 transitions. Word has length 23 [2022-03-15 16:06:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:49,127 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 10569 transitions. [2022-03-15 16:06:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 10569 transitions. [2022-03-15 16:06:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:49,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:49,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:49,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-15 16:06:49,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-15 16:06:49,345 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash 339906849, now seen corresponding path program 304 times [2022-03-15 16:06:49,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:49,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760037714] [2022-03-15 16:06:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:49,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:06:49,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:49,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760037714] [2022-03-15 16:06:49,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760037714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:49,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015832042] [2022-03-15 16:06:49,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:06:49,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:49,508 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:49,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-15 16:06:49,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:06:49,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:06:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:49,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 16:06:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:06:50,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 210 [2022-03-15 16:06:50,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-03-15 16:06:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:50,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:51,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-03-15 16:06:51,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 277 [2022-03-15 16:06:51,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:06:51,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 264 [2022-03-15 16:06:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:51,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015832042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:51,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:51,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:06:51,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669014257] [2022-03-15 16:06:51,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:51,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:06:51,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:06:51,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:06:51,732 INFO L87 Difference]: Start difference. First operand 2715 states and 10569 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:06:56,172 INFO L93 Difference]: Finished difference Result 4433 states and 15977 transitions. [2022-03-15 16:06:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:06:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:06:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:06:56,180 INFO L225 Difference]: With dead ends: 4433 [2022-03-15 16:06:56,180 INFO L226 Difference]: Without dead ends: 4315 [2022-03-15 16:06:56,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 34 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=972, Invalid=6510, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:06:56,181 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 399 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:06:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 662 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1624 Invalid, 0 Unknown, 380 Unchecked, 0.8s Time] [2022-03-15 16:06:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2022-03-15 16:06:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2629. [2022-03-15 16:06:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.86910197869102) internal successors, (10168), 2628 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10168 transitions. [2022-03-15 16:06:56,219 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10168 transitions. Word has length 23 [2022-03-15 16:06:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:06:56,219 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 10168 transitions. [2022-03-15 16:06:56,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:06:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10168 transitions. [2022-03-15 16:06:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:06:56,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:06:56,222 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:06:56,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-03-15 16:06:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-15 16:06:56,423 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:06:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:06:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1107162753, now seen corresponding path program 305 times [2022-03-15 16:06:56,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:06:56,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716119679] [2022-03-15 16:06:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:06:56,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:06:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:06:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:06:56,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:06:56,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716119679] [2022-03-15 16:06:56,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716119679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:06:56,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687338680] [2022-03-15 16:06:56,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:06:56,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:06:56,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:06:56,631 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:06:56,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-15 16:06:56,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:06:56,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:06:56,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:06:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:06:57,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 153 [2022-03-15 16:06:57,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 183 [2022-03-15 16:06:57,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 170 [2022-03-15 16:06:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:57,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:06:57,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-15 16:06:58,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 235 [2022-03-15 16:06:58,252 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:06:58,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 211 [2022-03-15 16:06:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:06:58,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687338680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:06:58,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:06:58,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-15 16:06:58,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580990740] [2022-03-15 16:06:58,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:06:58,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:06:58,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:06:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:06:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:06:58,503 INFO L87 Difference]: Start difference. First operand 2629 states and 10168 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:07,564 INFO L93 Difference]: Finished difference Result 5453 states and 18718 transitions. [2022-03-15 16:07:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-15 16:07:07,565 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:07:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:07,573 INFO L225 Difference]: With dead ends: 5453 [2022-03-15 16:07:07,574 INFO L226 Difference]: Without dead ends: 4955 [2022-03-15 16:07:07,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2204, Invalid=15886, Unknown=0, NotChecked=0, Total=18090 [2022-03-15 16:07:07,574 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 517 mSDsluCounter, 3044 mSDsCounter, 0 mSdLazyCounter, 5049 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 5049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:07,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1411 Invalid, 5254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 5049 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-15 16:07:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2022-03-15 16:07:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 2687. [2022-03-15 16:07:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 3.8466120625465376) internal successors, (10332), 2686 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 10332 transitions. [2022-03-15 16:07:07,619 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 10332 transitions. Word has length 23 [2022-03-15 16:07:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:07,619 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 10332 transitions. [2022-03-15 16:07:07,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 10332 transitions. [2022-03-15 16:07:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:07:07,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:07,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:07,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:07,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-15 16:07:07,824 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:07:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1843242201, now seen corresponding path program 306 times [2022-03-15 16:07:07,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:07,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841520634] [2022-03-15 16:07:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:07:07,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:07,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841520634] [2022-03-15 16:07:07,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841520634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:07,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137867600] [2022-03-15 16:07:07,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:07:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:07,943 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:07,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process Received shutdown request... [2022-03-15 16:07:08,122 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:07:08,144 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:07:08,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:07:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:07:08,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:08,271 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 16:07:08,273 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 16:07:08,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:08,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-15 16:07:08,474 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. [2022-03-15 16:07:08,476 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 16:07:08,476 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 16:07:08,476 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 16:07:08,478 INFO L732 BasicCegarLoop]: Path program histogram: [306, 6, 4, 3, 3, 1, 1, 1] [2022-03-15 16:07:08,480 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:07:08,480 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:07:08,482 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:07:08 BasicIcfg [2022-03-15 16:07:08,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:07:08,482 INFO L158 Benchmark]: Toolchain (without parser) took 716384.99ms. Allocated memory was 196.1MB in the beginning and 626.0MB in the end (delta: 429.9MB). Free memory was 154.9MB in the beginning and 409.9MB in the end (delta: -255.0MB). Peak memory consumption was 175.8MB. Max. memory is 8.0GB. [2022-03-15 16:07:08,482 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 196.1MB. Free memory is still 156.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:07:08,482 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.55ms. Allocated memory is still 196.1MB. Free memory was 154.9MB in the beginning and 153.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:07:08,482 INFO L158 Benchmark]: Boogie Preprocessor took 26.08ms. Allocated memory is still 196.1MB. Free memory was 153.2MB in the beginning and 152.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:07:08,482 INFO L158 Benchmark]: RCFGBuilder took 369.49ms. Allocated memory is still 196.1MB. Free memory was 152.1MB in the beginning and 135.5MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-03-15 16:07:08,482 INFO L158 Benchmark]: TraceAbstraction took 715941.38ms. Allocated memory was 196.1MB in the beginning and 626.0MB in the end (delta: 429.9MB). Free memory was 168.2MB in the beginning and 409.9MB in the end (delta: -241.7MB). Peak memory consumption was 188.7MB. Max. memory is 8.0GB. [2022-03-15 16:07:08,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 196.1MB. Free memory is still 156.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.55ms. Allocated memory is still 196.1MB. Free memory was 154.9MB in the beginning and 153.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.08ms. Allocated memory is still 196.1MB. Free memory was 153.2MB in the beginning and 152.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 369.49ms. Allocated memory is still 196.1MB. Free memory was 152.1MB in the beginning and 135.5MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 715941.38ms. Allocated memory was 196.1MB in the beginning and 626.0MB in the end (delta: 429.9MB). Free memory was 168.2MB in the beginning and 409.9MB in the end (delta: -241.7MB). Peak memory consumption was 188.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 133]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 137]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 715.8s, OverallIterations: 325, TraceHistogramMax: 3, PathProgramHistogramMax: 306, EmptinessCheckTime: 0.3s, AutomataDifference: 257.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52044 SdHoareTripleChecker+Valid, 107.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52044 mSDsluCounter, 98695 SdHoareTripleChecker+Invalid, 88.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31512 IncrementalHoareTripleChecker+Unchecked, 215261 mSDsCounter, 10514 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 277452 IncrementalHoareTripleChecker+Invalid, 319478 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10514 mSolverCounterUnsat, 8823 mSDtfsCounter, 277452 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21794 GetRequests, 10662 SyntacticMatches, 381 SemanticMatches, 10751 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 116752 ImplicationChecksByTransitivity, 207.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2715occurred in iteration=322, InterpolantAutomatonStates: 7154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 324 MinimizatonAttempts, 112659 StatesRemovedByMinimization, 319 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 334.4s InterpolantComputationTime, 13785 NumberOfCodeBlocks, 13773 NumberOfCodeBlocksAsserted, 978 NumberOfCheckSat, 19605 ConstructedInterpolants, 671 QuantifiedInterpolants, 168938 SizeOfPredicates, 3527 NumberOfNonLiveVariables, 31342 ConjunctsInSsa, 6086 ConjunctsInUnsatCore, 936 InterpolantComputations, 18 PerfectInterpolantSequences, 1854/6600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown