/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/popl20-more/dot-product.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:24:27,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:24:27,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:24:27,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-01 18:24:27,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-01 18:24:27,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-01 18:24:27,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-01 18:24:27,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-01 18:24:27,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-01 18:24:27,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-01 18:24:27,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-01 18:24:27,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-01 18:24:27,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:24:27,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:24:27,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:24:27,174 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 [2022-03-01 18:24:27,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:24:27,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:24:27,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:24:27,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:24:27,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:24:27,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:24:27,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:24:27,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:24:27,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:24:27,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:24:27,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:24:27,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:24:27,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:24:27,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:24:27,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:24:27,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:24:27,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:24:27,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:24:27,418 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:24:27,421 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:24:27,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl [2022-03-01 18:24:27,422 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl' [2022-03-01 18:24:27,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:24:27,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:24:27,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:24:27,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:24:27,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:24:27,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,468 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:24:27,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:24:27,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:24:27,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:24:27,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:24:27,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:24:27,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:24:27,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:24:27,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:24:27,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/1) ... [2022-03-01 18:24:27,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:24:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:27,523 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) [2022-03-01 18:24:27,542 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 [2022-03-01 18:24:27,554 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:24:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:24:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:24:27,554 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:24:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:24:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:24:27,554 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:24:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:24:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:24:27,555 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:24:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:24:27,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:24:27,555 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:24:27,600 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:24:27,601 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:24:27,715 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:24:27,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:24:27,726 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:24:27,727 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:24:27 BoogieIcfgContainer [2022-03-01 18:24:27,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:24:27,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:24:27,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:24:27,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:24:27,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:24:27" (1/2) ... [2022-03-01 18:24:27,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e017698 and model type dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:24:27, skipping insertion in model container [2022-03-01 18:24:27,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:24:27" (2/2) ... [2022-03-01 18:24:27,747 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product.wvr.bpl [2022-03-01 18:24:27,750 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:24:27,750 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:24:27,751 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:24:27,751 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:24:27,775 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:24:27,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:24:27,858 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 [2022-03-01 18:24:27,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:24:27,881 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-01 18:24:27,922 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:24:27,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:27,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:27,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash -798073446, now seen corresponding path program 1 times [2022-03-01 18:24:27,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:27,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174183631] [2022-03-01 18:24:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:27,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:28,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:28,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174183631] [2022-03-01 18:24:28,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174183631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:24:28,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:24:28,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:24:28,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956054347] [2022-03-01 18:24:28,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:24:28,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:24:28,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:24:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:24:28,072 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:28,105 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-01 18:24:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:24:28,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:24:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:28,113 INFO L225 Difference]: With dead ends: 217 [2022-03-01 18:24:28,113 INFO L226 Difference]: Without dead ends: 202 [2022-03-01 18:24:28,114 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 [2022-03-01 18:24:28,117 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:28,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:24:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-01 18:24:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-01 18:24:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-01 18:24:28,199 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-01 18:24:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:28,200 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-01 18:24:28,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-01 18:24:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:24:28,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:28,201 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] [2022-03-01 18:24:28,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:24:28,202 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash 216086682, now seen corresponding path program 1 times [2022-03-01 18:24:28,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:28,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876367477] [2022-03-01 18:24:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:28,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:28,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876367477] [2022-03-01 18:24:28,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876367477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:24:28,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:24:28,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:24:28,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834426267] [2022-03-01 18:24:28,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:24:28,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:24:28,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:24:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:24:28,272 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:28,334 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-01 18:24:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:24:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:24:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:28,336 INFO L225 Difference]: With dead ends: 158 [2022-03-01 18:24:28,336 INFO L226 Difference]: Without dead ends: 158 [2022-03-01 18:24:28,336 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 [2022-03-01 18:24:28,339 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:28,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:24:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-01 18:24:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-01 18:24:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 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) [2022-03-01 18:24:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-01 18:24:28,348 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-01 18:24:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:28,348 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-01 18:24:28,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-01 18:24:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:24:28,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:28,349 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] [2022-03-01 18:24:28,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:24:28,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash 924693880, now seen corresponding path program 1 times [2022-03-01 18:24:28,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:28,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799141710] [2022-03-01 18:24:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:28,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:28,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799141710] [2022-03-01 18:24:28,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799141710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:24:28,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:24:28,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:24:28,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473116947] [2022-03-01 18:24:28,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:24:28,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:24:28,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:24:28,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:24:28,393 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:28,432 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-01 18:24:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:24:28,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:24:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:28,434 INFO L225 Difference]: With dead ends: 183 [2022-03-01 18:24:28,434 INFO L226 Difference]: Without dead ends: 183 [2022-03-01 18:24:28,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:24:28,435 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:28,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:24:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-01 18:24:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-01 18:24:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-01 18:24:28,444 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-01 18:24:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:28,444 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-01 18:24:28,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-01 18:24:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:24:28,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:28,446 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, 1, 1] [2022-03-01 18:24:28,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:24:28,446 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash 575000696, now seen corresponding path program 1 times [2022-03-01 18:24:28,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:28,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070005389] [2022-03-01 18:24:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:28,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:28,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:28,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070005389] [2022-03-01 18:24:28,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070005389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:28,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599877819] [2022-03-01 18:24:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:28,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:28,673 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) [2022-03-01 18:24:28,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:24:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:28,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:24:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:29,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:29,016 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 31 treesize of output 27 [2022-03-01 18:24:29,025 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 18:24:29,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2022-03-01 18:24:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:29,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:29,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:29,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-01 18:24:29,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:29,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:29,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:29,198 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 15 treesize of output 20 [2022-03-01 18:24:29,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-03-01 18:24:29,262 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:24:29,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-01 18:24:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:29,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599877819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:29,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:29,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-01 18:24:29,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842320546] [2022-03-01 18:24:29,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:29,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:24:29,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:24:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:24:29,356 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2022-03-01 18:24:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:29,570 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-01 18:24:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:24:29,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 [2022-03-01 18:24:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:29,572 INFO L225 Difference]: With dead ends: 366 [2022-03-01 18:24:29,572 INFO L226 Difference]: Without dead ends: 351 [2022-03-01 18:24:29,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:24:29,573 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:29,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-01 18:24:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-01 18:24:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-01 18:24:29,583 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-01 18:24:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:29,584 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-01 18:24:29,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2022-03-01 18:24:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-01 18:24:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:24:29,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:29,585 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, 1, 1] [2022-03-01 18:24:29,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:29,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:29,806 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash 407191604, now seen corresponding path program 2 times [2022-03-01 18:24:29,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:29,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133273101] [2022-03-01 18:24:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:29,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:29,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133273101] [2022-03-01 18:24:29,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133273101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:29,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138690918] [2022-03-01 18:24:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:29,996 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) [2022-03-01 18:24:29,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:24:30,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:30,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:24:30,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:30,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:30,257 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 27 treesize of output 31 [2022-03-01 18:24:30,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:30,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-01 18:24:30,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:30,276 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-01 18:24:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:30,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:30,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:30,463 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 24 treesize of output 29 [2022-03-01 18:24:30,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:30,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:30,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:30,477 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 18:24:30,508 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 18:24:30,513 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:24:30,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-01 18:24:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:30,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138690918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:30,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:30,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-03-01 18:24:30,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001229304] [2022-03-01 18:24:30,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:30,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:24:30,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:24:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:24:30,611 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2022-03-01 18:24:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:31,130 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-01 18:24:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:24:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 22 [2022-03-01 18:24:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:31,132 INFO L225 Difference]: With dead ends: 478 [2022-03-01 18:24:31,132 INFO L226 Difference]: Without dead ends: 463 [2022-03-01 18:24:31,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:24:31,133 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:31,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 97 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:24:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-01 18:24:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-01 18:24:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-01 18:24:31,159 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-01 18:24:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:31,159 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-01 18:24:31,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2022-03-01 18:24:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-01 18:24:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:24:31,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:31,160 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, 1, 1] [2022-03-01 18:24:31,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:31,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:31,361 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash 705965052, now seen corresponding path program 3 times [2022-03-01 18:24:31,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:31,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831420277] [2022-03-01 18:24:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:31,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:31,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831420277] [2022-03-01 18:24:31,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831420277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:31,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48941325] [2022-03-01 18:24:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:31,493 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) [2022-03-01 18:24:31,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:24:31,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:24:31,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:24:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:31,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 15 [2022-03-01 18:24:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:31,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:31,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:31,813 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 24 treesize of output 29 [2022-03-01 18:24:31,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:31,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:31,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:31,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 18:24:31,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 18:24:31,860 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:24:31,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-01 18:24:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:32,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48941325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:32,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:32,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:24:32,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761720737] [2022-03-01 18:24:32,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:32,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:24:32,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:24:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:24:32,003 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2022-03-01 18:24:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:32,366 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-03-01 18:24:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:24:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2022-03-01 18:24:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:32,368 INFO L225 Difference]: With dead ends: 418 [2022-03-01 18:24:32,369 INFO L226 Difference]: Without dead ends: 403 [2022-03-01 18:24:32,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:24:32,371 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:32,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 86 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-01 18:24:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-03-01 18:24:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-01 18:24:32,381 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-01 18:24:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:32,381 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-01 18:24:32,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2022-03-01 18:24:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-01 18:24:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:24:32,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:32,382 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, 1, 1] [2022-03-01 18:24:32,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:32,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:32,604 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2018176644, now seen corresponding path program 4 times [2022-03-01 18:24:32,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:32,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907589951] [2022-03-01 18:24:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:32,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:32,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907589951] [2022-03-01 18:24:32,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907589951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:32,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166029348] [2022-03-01 18:24:32,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:32,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:32,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:32,764 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) [2022-03-01 18:24:32,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:24:32,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:24:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:32,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:32,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-03-01 18:24:32,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:32,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-03-01 18:24:32,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:32,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 21 [2022-03-01 18:24:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:33,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:33,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:33,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-01 18:24:33,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:33,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:33,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:33,158 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 15 treesize of output 20 [2022-03-01 18:24:33,196 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 23 treesize of output 19 [2022-03-01 18:24:33,202 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:24:33,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-01 18:24:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:33,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166029348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:33,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:33,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:24:33,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75843385] [2022-03-01 18:24:33,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:33,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:24:33,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:24:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:24:33,316 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-03-01 18:24:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:33,536 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-01 18:24:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:24:33,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2022-03-01 18:24:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:33,538 INFO L225 Difference]: With dead ends: 381 [2022-03-01 18:24:33,538 INFO L226 Difference]: Without dead ends: 366 [2022-03-01 18:24:33,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:24:33,539 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:33,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 94 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-03-01 18:24:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-01 18:24:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-01 18:24:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-01 18:24:33,546 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-01 18:24:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:33,546 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-01 18:24:33,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2022-03-01 18:24:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-01 18:24:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:24:33,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:33,547 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, 1, 1] [2022-03-01 18:24:33,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:33,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:33,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 29371358, now seen corresponding path program 5 times [2022-03-01 18:24:33,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:33,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055256034] [2022-03-01 18:24:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:33,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:33,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055256034] [2022-03-01 18:24:33,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055256034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:33,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978198858] [2022-03-01 18:24:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:33,885 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) [2022-03-01 18:24:33,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:24:33,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:24:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:24:33,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:34,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:34,071 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2022-03-01 18:24:34,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:34,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 61 [2022-03-01 18:24:34,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:34,086 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 16 treesize of output 21 [2022-03-01 18:24:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:34,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:34,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:34,381 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 24 treesize of output 29 [2022-03-01 18:24:34,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:34,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:34,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:34,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 18:24:34,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-03-01 18:24:34,443 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:24:34,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-01 18:24:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:34,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978198858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:34,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:34,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-01 18:24:34,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617300338] [2022-03-01 18:24:34,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:34,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:24:34,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:24:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:24:34,610 INFO L87 Difference]: Start difference. First operand 250 states and 733 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) [2022-03-01 18:24:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:39,020 INFO L93 Difference]: Finished difference Result 1134 states and 3376 transitions. [2022-03-01 18:24:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 18:24:39,021 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 22 [2022-03-01 18:24:39,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:39,025 INFO L225 Difference]: With dead ends: 1134 [2022-03-01 18:24:39,025 INFO L226 Difference]: Without dead ends: 1119 [2022-03-01 18:24:39,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2044, Invalid=7856, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 18:24:39,027 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 547 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:39,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 238 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 691 Invalid, 0 Unknown, 372 Unchecked, 0.5s Time] [2022-03-01 18:24:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-01 18:24:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 261. [2022-03-01 18:24:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-03-01 18:24:39,037 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-03-01 18:24:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:39,037 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-03-01 18:24:39,037 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) [2022-03-01 18:24:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-03-01 18:24:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:24:39,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:39,040 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, 1, 1] [2022-03-01 18:24:39,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:39,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:39,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1593497758, now seen corresponding path program 6 times [2022-03-01 18:24:39,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:39,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743116504] [2022-03-01 18:24:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:39,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:39,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743116504] [2022-03-01 18:24:39,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743116504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:39,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894988978] [2022-03-01 18:24:39,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:39,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:39,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:39,372 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) [2022-03-01 18:24:39,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:24:39,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:24:39,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:39,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:24:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:39,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-03-01 18:24:39,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-03-01 18:24:39,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,551 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 16 treesize of output 21 [2022-03-01 18:24:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:39,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-01 18:24:39,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:39,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:39,755 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 15 treesize of output 20 [2022-03-01 18:24:39,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-03-01 18:24:39,793 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-01 18:24:39,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-01 18:24:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:39,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894988978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:39,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:39,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-01 18:24:39,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013877282] [2022-03-01 18:24:39,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:39,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:24:39,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:24:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:24:39,876 INFO L87 Difference]: Start difference. First operand 261 states and 785 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-03-01 18:24:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:40,629 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-03-01 18:24:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:24:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 [2022-03-01 18:24:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:40,633 INFO L225 Difference]: With dead ends: 585 [2022-03-01 18:24:40,633 INFO L226 Difference]: Without dead ends: 570 [2022-03-01 18:24:40,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:24:40,633 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:40,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:24:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-01 18:24:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-03-01 18:24:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-03-01 18:24:40,642 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-03-01 18:24:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:40,642 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-03-01 18:24:40,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-03-01 18:24:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-03-01 18:24:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:40,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:40,644 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, 1, 1] [2022-03-01 18:24:40,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:40,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:40,860 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1804181270, now seen corresponding path program 7 times [2022-03-01 18:24:40,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:40,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804657751] [2022-03-01 18:24:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:40,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:40,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804657751] [2022-03-01 18:24:40,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804657751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:40,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593574083] [2022-03-01 18:24:40,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:40,911 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) [2022-03-01 18:24:40,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:24:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:40,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:41,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:41,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593574083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:41,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:41,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:24:41,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442003343] [2022-03-01 18:24:41,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:41,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:24:41,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:24:41,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:24:41,149 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-03-01 18:24:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:41,820 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-03-01 18:24:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:24:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 24 [2022-03-01 18:24:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:41,824 INFO L225 Difference]: With dead ends: 1123 [2022-03-01 18:24:41,824 INFO L226 Difference]: Without dead ends: 1123 [2022-03-01 18:24:41,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:24:41,825 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:41,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 200 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:24:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-01 18:24:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-03-01 18:24:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 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) [2022-03-01 18:24:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-03-01 18:24:41,837 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-03-01 18:24:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:41,838 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-03-01 18:24:41,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-03-01 18:24:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-03-01 18:24:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:41,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:41,839 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, 1, 1] [2022-03-01 18:24:41,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:42,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:42,056 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 827862426, now seen corresponding path program 8 times [2022-03-01 18:24:42,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:42,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005336606] [2022-03-01 18:24:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:42,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:42,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:42,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005336606] [2022-03-01 18:24:42,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005336606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:42,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608260220] [2022-03-01 18:24:42,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:42,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:42,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:42,125 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) [2022-03-01 18:24:42,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:24:42,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:42,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:42,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:42,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:42,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608260220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:42,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:42,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:24:42,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521753079] [2022-03-01 18:24:42,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:42,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:24:42,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:24:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:24:42,348 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:24:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:44,103 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-03-01 18:24:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:24:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-03-01 18:24:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:44,110 INFO L225 Difference]: With dead ends: 1814 [2022-03-01 18:24:44,110 INFO L226 Difference]: Without dead ends: 1814 [2022-03-01 18:24:44,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:24:44,112 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 482 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:44,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 328 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:24:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-03-01 18:24:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-03-01 18:24:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 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) [2022-03-01 18:24:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-01 18:24:44,128 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-01 18:24:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:44,128 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-01 18:24:44,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:24:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-01 18:24:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:44,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:44,129 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, 1, 1] [2022-03-01 18:24:44,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:44,345 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,SelfDestructingSolverStorable10 [2022-03-01 18:24:44,345 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:44,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1394814506, now seen corresponding path program 9 times [2022-03-01 18:24:44,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:44,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948068325] [2022-03-01 18:24:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:44,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:44,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:44,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948068325] [2022-03-01 18:24:44,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948068325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:44,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651043128] [2022-03-01 18:24:44,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:44,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:44,386 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) [2022-03-01 18:24:44,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:24:44,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:24:44,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:44,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:44,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651043128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:44,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:44,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:24:44,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974170703] [2022-03-01 18:24:44,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:44,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:24:44,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:24:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:24:44,596 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:24:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:45,419 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-01 18:24:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:24:45,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-03-01 18:24:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:45,425 INFO L225 Difference]: With dead ends: 1470 [2022-03-01 18:24:45,425 INFO L226 Difference]: Without dead ends: 1470 [2022-03-01 18:24:45,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:24:45,426 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 363 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:45,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 275 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:24:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-01 18:24:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-01 18:24:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 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) [2022-03-01 18:24:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-01 18:24:45,458 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-01 18:24:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:45,458 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-01 18:24:45,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:24:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-01 18:24:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:45,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:45,459 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, 1, 1, 1, 1] [2022-03-01 18:24:45,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:45,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:45,675 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:45,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1964014118, now seen corresponding path program 1 times [2022-03-01 18:24:45,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:45,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408768018] [2022-03-01 18:24:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:45,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:45,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408768018] [2022-03-01 18:24:45,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408768018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:45,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547551753] [2022-03-01 18:24:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:45,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:45,708 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) [2022-03-01 18:24:45,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:24:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:45,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:24:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:45,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:45,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547551753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:45,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:45,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:24:45,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941907886] [2022-03-01 18:24:45,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:45,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:24:45,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:24:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:24:45,862 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:24:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:45,989 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-01 18:24:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:24:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-01 18:24:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:45,992 INFO L225 Difference]: With dead ends: 685 [2022-03-01 18:24:45,992 INFO L226 Difference]: Without dead ends: 679 [2022-03-01 18:24:45,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:24:45,993 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:45,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 39 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-01 18:24:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-01 18:24:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-01 18:24:46,003 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-01 18:24:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:46,003 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-01 18:24:46,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:24:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-01 18:24:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:46,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:46,004 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, 1, 1] [2022-03-01 18:24:46,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-01 18:24:46,218 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,SelfDestructingSolverStorable12 [2022-03-01 18:24:46,218 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:46,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:46,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1893984470, now seen corresponding path program 10 times [2022-03-01 18:24:46,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:46,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122231798] [2022-03-01 18:24:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:46,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:46,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:46,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122231798] [2022-03-01 18:24:46,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122231798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:46,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068722668] [2022-03-01 18:24:46,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:46,270 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) [2022-03-01 18:24:46,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:24:46,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:46,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:46,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:46,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068722668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:46,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:46,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:24:46,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195823220] [2022-03-01 18:24:46,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:46,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:24:46,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:24:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:24:46,487 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-03-01 18:24:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:46,731 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-01 18:24:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:24:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 24 [2022-03-01 18:24:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:46,736 INFO L225 Difference]: With dead ends: 1159 [2022-03-01 18:24:46,736 INFO L226 Difference]: Without dead ends: 1111 [2022-03-01 18:24:46,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:24:46,737 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 284 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:46,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 110 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-01 18:24:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-01 18:24:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-01 18:24:46,751 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-01 18:24:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:46,751 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-01 18:24:46,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-03-01 18:24:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-01 18:24:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:46,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:46,753 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, 1, 1, 1, 1] [2022-03-01 18:24:46,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:46,967 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,SelfDestructingSolverStorable13 [2022-03-01 18:24:46,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1188027138, now seen corresponding path program 2 times [2022-03-01 18:24:46,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:46,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054337685] [2022-03-01 18:24:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:46,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:46,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:46,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054337685] [2022-03-01 18:24:46,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054337685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:46,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129775691] [2022-03-01 18:24:46,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:46,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:46,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:47,000 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) [2022-03-01 18:24:47,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:24:47,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:24:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:47,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:47,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129775691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:47,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:47,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:24:47,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59190650] [2022-03-01 18:24:47,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:47,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:24:47,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:24:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:24:47,191 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:24:47,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:47,375 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-01 18:24:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:24:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-01 18:24:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:47,384 INFO L225 Difference]: With dead ends: 1267 [2022-03-01 18:24:47,384 INFO L226 Difference]: Without dead ends: 1267 [2022-03-01 18:24:47,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:24:47,385 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:47,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 66 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-01 18:24:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-01 18:24:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-01 18:24:47,402 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-01 18:24:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:47,402 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-01 18:24:47,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:24:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-01 18:24:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:47,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:47,404 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, 1, 1] [2022-03-01 18:24:47,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:47,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:24:47,623 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash -158654428, now seen corresponding path program 11 times [2022-03-01 18:24:47,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:47,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832564133] [2022-03-01 18:24:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:47,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:47,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:47,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832564133] [2022-03-01 18:24:47,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832564133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:47,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089760770] [2022-03-01 18:24:47,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:47,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:47,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:47,661 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) [2022-03-01 18:24:47,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:24:47,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:24:47,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:47,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:47,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089760770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:47,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:47,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:24:47,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550480160] [2022-03-01 18:24:47,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:47,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:24:47,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:47,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:24:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:24:47,794 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:24:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:48,220 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-01 18:24:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:24:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-01 18:24:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:48,228 INFO L225 Difference]: With dead ends: 2268 [2022-03-01 18:24:48,228 INFO L226 Difference]: Without dead ends: 2268 [2022-03-01 18:24:48,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:24:48,230 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:48,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 165 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:24:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-01 18:24:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-01 18:24:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-01 18:24:48,253 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-01 18:24:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:48,253 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-01 18:24:48,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:24:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-01 18:24:48,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:48,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:48,256 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, 1, 1] [2022-03-01 18:24:48,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-01 18:24:48,488 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,SelfDestructingSolverStorable15 [2022-03-01 18:24:48,488 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash 626259666, now seen corresponding path program 12 times [2022-03-01 18:24:48,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:48,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964269081] [2022-03-01 18:24:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:48,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:48,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964269081] [2022-03-01 18:24:48,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964269081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:48,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442442763] [2022-03-01 18:24:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:48,539 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) [2022-03-01 18:24:48,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:24:48,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:24:48,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:48,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:48,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:48,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442442763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:48,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:48,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:24:48,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127148295] [2022-03-01 18:24:48,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:48,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:24:48,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:24:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:24:48,695 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:24:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:49,133 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-01 18:24:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:24:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-01 18:24:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:49,160 INFO L225 Difference]: With dead ends: 2256 [2022-03-01 18:24:49,160 INFO L226 Difference]: Without dead ends: 2256 [2022-03-01 18:24:49,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:24:49,162 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:49,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 154 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:24:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-01 18:24:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-01 18:24:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-01 18:24:49,186 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-01 18:24:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:49,186 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-01 18:24:49,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:24:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-01 18:24:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:49,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:49,188 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, 1, 1] [2022-03-01 18:24:49,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 18:24:49,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:49,403 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1014315128, now seen corresponding path program 13 times [2022-03-01 18:24:49,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:49,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297445140] [2022-03-01 18:24:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:49,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:49,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297445140] [2022-03-01 18:24:49,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297445140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:49,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945362097] [2022-03-01 18:24:49,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:49,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:49,444 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) [2022-03-01 18:24:49,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:24:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:49,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:49,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:49,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945362097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:49,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:49,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-01 18:24:49,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709145673] [2022-03-01 18:24:49,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:49,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:24:49,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:24:49,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:24:49,611 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-03-01 18:24:49,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:49,854 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-01 18:24:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:24:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 24 [2022-03-01 18:24:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:49,859 INFO L225 Difference]: With dead ends: 1611 [2022-03-01 18:24:49,859 INFO L226 Difference]: Without dead ends: 1611 [2022-03-01 18:24:49,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:24:49,860 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 217 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:49,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 110 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-01 18:24:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-01 18:24:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-01 18:24:49,879 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-01 18:24:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:49,879 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-01 18:24:49,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-03-01 18:24:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-01 18:24:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:49,881 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:49,881 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, 1, 1] [2022-03-01 18:24:49,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:50,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:24:50,098 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 581438524, now seen corresponding path program 14 times [2022-03-01 18:24:50,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:50,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56082699] [2022-03-01 18:24:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:50,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56082699] [2022-03-01 18:24:50,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56082699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:50,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182136215] [2022-03-01 18:24:50,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:50,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:50,145 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) [2022-03-01 18:24:50,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:24:50,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:50,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182136215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:50,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:50,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:24:50,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142534022] [2022-03-01 18:24:50,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:50,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:24:50,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:24:50,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:24:50,355 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:24:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:50,905 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-01 18:24:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:24:50,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-01 18:24:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:50,910 INFO L225 Difference]: With dead ends: 2408 [2022-03-01 18:24:50,911 INFO L226 Difference]: Without dead ends: 2404 [2022-03-01 18:24:50,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:24:50,912 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 253 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:50,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 168 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:24:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-01 18:24:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-01 18:24:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-01 18:24:50,939 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-01 18:24:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:50,939 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-01 18:24:50,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:24:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-01 18:24:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:50,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:50,941 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, 1, 1] [2022-03-01 18:24:50,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:51,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:51,155 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash 716068860, now seen corresponding path program 15 times [2022-03-01 18:24:51,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:51,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459783914] [2022-03-01 18:24:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:51,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:51,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:51,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459783914] [2022-03-01 18:24:51,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459783914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:51,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703753990] [2022-03-01 18:24:51,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:51,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:51,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:51,191 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) [2022-03-01 18:24:51,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:24:51,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:24:51,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:51,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:51,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703753990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:51,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:51,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:24:51,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664269001] [2022-03-01 18:24:51,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:51,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:24:51,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:24:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:24:51,382 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:24:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:52,140 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-01 18:24:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 18:24:52,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-01 18:24:52,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:52,148 INFO L225 Difference]: With dead ends: 3509 [2022-03-01 18:24:52,148 INFO L226 Difference]: Without dead ends: 3509 [2022-03-01 18:24:52,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:24:52,150 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 571 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:52,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 240 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:24:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-01 18:24:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-01 18:24:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-01 18:24:52,213 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-01 18:24:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:52,213 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-01 18:24:52,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:24:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-01 18:24:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:52,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:52,216 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, 1, 1] [2022-03-01 18:24:52,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-01 18:24:52,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:52,432 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1935859282, now seen corresponding path program 16 times [2022-03-01 18:24:52,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:52,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619443856] [2022-03-01 18:24:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:52,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:52,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:52,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619443856] [2022-03-01 18:24:52,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619443856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:52,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928011317] [2022-03-01 18:24:52,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:52,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:52,491 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) [2022-03-01 18:24:52,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:24:52,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:52,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:52,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928011317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:52,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:52,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:24:52,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953222318] [2022-03-01 18:24:52,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:52,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:24:52,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:52,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:24:52,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:24:52,686 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:24:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:53,793 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-01 18:24:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:24:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-01 18:24:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:53,800 INFO L225 Difference]: With dead ends: 3211 [2022-03-01 18:24:53,801 INFO L226 Difference]: Without dead ends: 3207 [2022-03-01 18:24:53,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:24:53,803 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 512 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:53,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 251 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:24:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-01 18:24:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-01 18:24:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-01 18:24:53,832 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-01 18:24:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:53,832 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-01 18:24:53,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:24:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-01 18:24:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:53,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:53,838 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, 1, 1, 1, 1] [2022-03-01 18:24:53,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:54,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:54,055 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1446822462, now seen corresponding path program 3 times [2022-03-01 18:24:54,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:54,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932942363] [2022-03-01 18:24:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:54,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:54,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:54,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932942363] [2022-03-01 18:24:54,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932942363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:54,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793984530] [2022-03-01 18:24:54,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:54,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:54,085 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) [2022-03-01 18:24:54,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:24:54,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:24:54,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:54,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:24:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:54,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:54,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793984530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:54,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:54,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-01 18:24:54,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80658883] [2022-03-01 18:24:54,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:54,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:24:54,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:24:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:24:54,213 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-03-01 18:24:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:54,305 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-01 18:24:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:24:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 24 [2022-03-01 18:24:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:54,334 INFO L225 Difference]: With dead ends: 1333 [2022-03-01 18:24:54,334 INFO L226 Difference]: Without dead ends: 1333 [2022-03-01 18:24:54,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:24:54,335 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:54,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-01 18:24:54,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-01 18:24:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-01 18:24:54,369 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-01 18:24:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:54,369 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-01 18:24:54,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-03-01 18:24:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-01 18:24:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:54,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:54,371 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, 1, 1] [2022-03-01 18:24:54,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-01 18:24:54,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:54,591 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:54,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1917945090, now seen corresponding path program 17 times [2022-03-01 18:24:54,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:54,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767265723] [2022-03-01 18:24:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:54,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:54,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:54,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767265723] [2022-03-01 18:24:54,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767265723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:54,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548467932] [2022-03-01 18:24:54,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:54,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:54,633 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) [2022-03-01 18:24:54,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:24:54,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:24:54,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:54,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:54,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548467932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:54,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:54,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:24:54,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410104609] [2022-03-01 18:24:54,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:54,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:24:54,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:24:54,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:24:54,783 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:24:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:55,187 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-01 18:24:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:24:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-01 18:24:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:55,192 INFO L225 Difference]: With dead ends: 2129 [2022-03-01 18:24:55,193 INFO L226 Difference]: Without dead ends: 2129 [2022-03-01 18:24:55,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:24:55,193 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:55,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 142 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:24:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-01 18:24:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-01 18:24:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-01 18:24:55,218 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-01 18:24:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:55,218 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-01 18:24:55,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:24:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-01 18:24:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:55,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:55,220 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, 1, 1] [2022-03-01 18:24:55,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:55,430 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,SelfDestructingSolverStorable22 [2022-03-01 18:24:55,430 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -15265638, now seen corresponding path program 18 times [2022-03-01 18:24:55,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:55,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645079102] [2022-03-01 18:24:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:55,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:55,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645079102] [2022-03-01 18:24:55,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645079102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:55,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602231102] [2022-03-01 18:24:55,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:55,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:55,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:55,464 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) [2022-03-01 18:24:55,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:24:55,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:24:55,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:55,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:55,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602231102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:55,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:55,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 18:24:55,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522132948] [2022-03-01 18:24:55,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:55,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:24:55,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:55,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:24:55,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:24:55,646 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:24:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:55,990 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-01 18:24:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:24:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-01 18:24:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:55,995 INFO L225 Difference]: With dead ends: 2262 [2022-03-01 18:24:55,995 INFO L226 Difference]: Without dead ends: 2262 [2022-03-01 18:24:55,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:24:55,996 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:55,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-01 18:24:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-01 18:24:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-01 18:24:56,025 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-01 18:24:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-01 18:24:56,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:24:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-01 18:24:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:56,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:56,028 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, 1, 1] [2022-03-01 18:24:56,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:56,244 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,SelfDestructingSolverStorable23 [2022-03-01 18:24:56,244 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1098288294, now seen corresponding path program 19 times [2022-03-01 18:24:56,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:56,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771152948] [2022-03-01 18:24:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:56,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771152948] [2022-03-01 18:24:56,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771152948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:56,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934737513] [2022-03-01 18:24:56,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:56,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:56,286 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) [2022-03-01 18:24:56,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:24:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:56,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:56,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934737513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:56,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:56,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-01 18:24:56,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095680807] [2022-03-01 18:24:56,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:56,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:24:56,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:24:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:24:56,425 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-01 18:24:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:56,684 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-01 18:24:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:24:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-03-01 18:24:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:56,687 INFO L225 Difference]: With dead ends: 1474 [2022-03-01 18:24:56,688 INFO L226 Difference]: Without dead ends: 1464 [2022-03-01 18:24:56,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:24:56,688 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:56,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:24:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-01 18:24:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-01 18:24:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-01 18:24:56,707 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-01 18:24:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:56,707 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-01 18:24:56,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-01 18:24:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-01 18:24:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:56,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:56,709 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, 1, 1] [2022-03-01 18:24:56,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-01 18:24:56,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:56,915 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash -60086780, now seen corresponding path program 20 times [2022-03-01 18:24:56,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:56,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474618876] [2022-03-01 18:24:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:56,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:56,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:56,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474618876] [2022-03-01 18:24:56,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474618876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:56,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726418005] [2022-03-01 18:24:56,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:56,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:56,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:56,970 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) [2022-03-01 18:24:56,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:24:56,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:56,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:57,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:57,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726418005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:57,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:57,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 18:24:57,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515502385] [2022-03-01 18:24:57,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:57,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:24:57,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:24:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:24:57,059 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:24:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:57,253 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-01 18:24:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:24:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-01 18:24:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:57,273 INFO L225 Difference]: With dead ends: 2318 [2022-03-01 18:24:57,273 INFO L226 Difference]: Without dead ends: 2314 [2022-03-01 18:24:57,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:24:57,274 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:57,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 121 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:24:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-01 18:24:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-01 18:24:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-01 18:24:57,302 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-01 18:24:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:57,302 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-01 18:24:57,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:24:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-01 18:24:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:57,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:57,306 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, 1, 1] [2022-03-01 18:24:57,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:57,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:57,519 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash 537249878, now seen corresponding path program 21 times [2022-03-01 18:24:57,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:57,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20483128] [2022-03-01 18:24:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:57,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:57,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:57,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20483128] [2022-03-01 18:24:57,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20483128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:57,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635030391] [2022-03-01 18:24:57,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:57,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:57,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:57,561 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) [2022-03-01 18:24:57,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:24:57,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:24:57,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:57,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:57,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635030391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:57,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:57,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:24:57,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759241643] [2022-03-01 18:24:57,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:57,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:24:57,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:24:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:24:57,683 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:24:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:57,978 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-01 18:24:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:24:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-01 18:24:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:57,983 INFO L225 Difference]: With dead ends: 2302 [2022-03-01 18:24:57,983 INFO L226 Difference]: Without dead ends: 2290 [2022-03-01 18:24:57,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:24:57,984 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:57,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 124 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:24:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-01 18:24:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-01 18:24:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-01 18:24:58,008 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-01 18:24:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:58,009 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-01 18:24:58,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:24:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-01 18:24:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:58,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:58,011 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, 1, 1] [2022-03-01 18:24:58,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:58,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:24:58,227 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:58,227 INFO L85 PathProgramCache]: Analyzing trace with hash 10829594, now seen corresponding path program 22 times [2022-03-01 18:24:58,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:58,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663141930] [2022-03-01 18:24:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:58,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:58,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663141930] [2022-03-01 18:24:58,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663141930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:58,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850548154] [2022-03-01 18:24:58,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:58,272 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) [2022-03-01 18:24:58,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:24:58,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:58,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:58,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:58,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850548154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:58,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:58,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:24:58,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141950029] [2022-03-01 18:24:58,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:58,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:24:58,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:24:58,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:24:58,469 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:24:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:59,279 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-01 18:24:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:24:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-03-01 18:24:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:59,288 INFO L225 Difference]: With dead ends: 4760 [2022-03-01 18:24:59,288 INFO L226 Difference]: Without dead ends: 4760 [2022-03-01 18:24:59,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:24:59,289 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 408 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:59,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 205 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:24:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-01 18:24:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-01 18:24:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-01 18:24:59,333 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-01 18:24:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:59,333 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-01 18:24:59,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:24:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-01 18:24:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:24:59,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:59,336 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, 1, 1] [2022-03-01 18:24:59,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-01 18:24:59,552 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,SelfDestructingSolverStorable27 [2022-03-01 18:24:59,553 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 577781674, now seen corresponding path program 23 times [2022-03-01 18:24:59,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:59,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296006568] [2022-03-01 18:24:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:59,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:59,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296006568] [2022-03-01 18:24:59,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296006568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:59,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735857704] [2022-03-01 18:24:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:59,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:59,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:59,607 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) [2022-03-01 18:24:59,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:24:59,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:24:59,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:59,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:24:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:59,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:59,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735857704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:59,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:59,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:24:59,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002539873] [2022-03-01 18:24:59,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:59,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:24:59,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:59,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:24:59,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:24:59,819 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:25:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:00,476 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-01 18:25:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:25:00,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-03-01 18:25:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:00,485 INFO L225 Difference]: With dead ends: 4260 [2022-03-01 18:25:00,485 INFO L226 Difference]: Without dead ends: 4260 [2022-03-01 18:25:00,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:25:00,486 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 452 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:00,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 199 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:25:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-01 18:25:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-01 18:25:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-01 18:25:00,531 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-01 18:25:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:00,531 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-01 18:25:00,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:25:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-01 18:25:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:00,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:00,534 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, 1, 1] [2022-03-01 18:25:00,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:00,747 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,SelfDestructingSolverStorable28 [2022-03-01 18:25:00,747 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash -594564184, now seen corresponding path program 24 times [2022-03-01 18:25:00,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:00,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354238841] [2022-03-01 18:25:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:00,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:00,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:00,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354238841] [2022-03-01 18:25:00,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354238841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:00,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975294746] [2022-03-01 18:25:00,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:25:00,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:00,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:00,797 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) [2022-03-01 18:25:00,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:25:00,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:25:00,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:00,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:00,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975294746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:00,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:00,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:25:00,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814505718] [2022-03-01 18:25:00,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:00,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:25:00,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:00,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:25:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:25:00,941 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:25:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:01,469 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-01 18:25:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:25:01,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-03-01 18:25:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:01,478 INFO L225 Difference]: With dead ends: 4602 [2022-03-01 18:25:01,479 INFO L226 Difference]: Without dead ends: 4602 [2022-03-01 18:25:01,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:25:01,480 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 307 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:01,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 189 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:01,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-01 18:25:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-01 18:25:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-01 18:25:01,529 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-01 18:25:01,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:01,530 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-01 18:25:01,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:25:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-01 18:25:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:01,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:01,533 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, 1, 1] [2022-03-01 18:25:01,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:01,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:01,748 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash -513188096, now seen corresponding path program 25 times [2022-03-01 18:25:01,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:01,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936026950] [2022-03-01 18:25:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:01,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:01,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:01,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936026950] [2022-03-01 18:25:01,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936026950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:01,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010663000] [2022-03-01 18:25:01,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:25:01,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:01,787 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) [2022-03-01 18:25:01,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:25:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:01,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:01,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:01,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010663000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:01,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:01,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:25:01,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166081145] [2022-03-01 18:25:01,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:01,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:25:01,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:25:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:25:01,994 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:25:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:02,531 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-01 18:25:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:25:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-03-01 18:25:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:02,538 INFO L225 Difference]: With dead ends: 4348 [2022-03-01 18:25:02,539 INFO L226 Difference]: Without dead ends: 4344 [2022-03-01 18:25:02,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:25:02,540 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 387 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:02,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 153 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:25:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-01 18:25:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-01 18:25:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-01 18:25:02,580 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-01 18:25:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:02,580 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-01 18:25:02,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:25:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-01 18:25:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:02,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:02,593 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, 1, 1] [2022-03-01 18:25:02,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:02,799 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash 417469120, now seen corresponding path program 26 times [2022-03-01 18:25:02,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:02,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63004985] [2022-03-01 18:25:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:02,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:02,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63004985] [2022-03-01 18:25:02,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63004985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:02,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609191545] [2022-03-01 18:25:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:25:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:02,862 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) [2022-03-01 18:25:02,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:25:02,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:25:02,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:02,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:02,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:25:03,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609191545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:03,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:03,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:25:03,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122752619] [2022-03-01 18:25:03,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:03,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:25:03,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:25:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:25:03,021 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:25:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:03,468 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-01 18:25:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:25:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-01 18:25:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:03,475 INFO L225 Difference]: With dead ends: 4035 [2022-03-01 18:25:03,475 INFO L226 Difference]: Without dead ends: 4035 [2022-03-01 18:25:03,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:25:03,477 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 416 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:03,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 206 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-01 18:25:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-01 18:25:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-01 18:25:03,517 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-01 18:25:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:03,517 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-01 18:25:03,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:25:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-01 18:25:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:03,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:03,520 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, 1, 1] [2022-03-01 18:25:03,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 18:25:03,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:03,725 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2060508274, now seen corresponding path program 27 times [2022-03-01 18:25:03,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:03,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430903536] [2022-03-01 18:25:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:03,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:03,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:03,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430903536] [2022-03-01 18:25:03,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430903536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:03,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037125645] [2022-03-01 18:25:03,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:25:03,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:03,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:03,762 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) [2022-03-01 18:25:03,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:25:03,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:25:03,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:03,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:25:03,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037125645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:03,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:03,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:25:03,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028437831] [2022-03-01 18:25:03,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:03,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:25:03,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:25:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:25:03,893 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:25:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:04,414 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-01 18:25:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:25:04,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-03-01 18:25:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:04,421 INFO L225 Difference]: With dead ends: 3794 [2022-03-01 18:25:04,421 INFO L226 Difference]: Without dead ends: 3790 [2022-03-01 18:25:04,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:25:04,422 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 332 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:04,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 201 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:04,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-01 18:25:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-01 18:25:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-01 18:25:04,455 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-01 18:25:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:04,456 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-01 18:25:04,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:25:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-01 18:25:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:04,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:04,458 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, 1, 1] [2022-03-01 18:25:04,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:04,664 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,SelfDestructingSolverStorable32 [2022-03-01 18:25:04,665 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:04,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1231031038, now seen corresponding path program 28 times [2022-03-01 18:25:04,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:04,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512391952] [2022-03-01 18:25:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:04,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:04,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:04,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512391952] [2022-03-01 18:25:04,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512391952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:04,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435497344] [2022-03-01 18:25:04,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:04,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:04,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:04,701 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) [2022-03-01 18:25:04,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:25:04,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:04,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:04,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435497344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:04,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:04,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:25:04,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871702120] [2022-03-01 18:25:04,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:04,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:25:04,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:25:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:25:04,844 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:25:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:05,457 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-01 18:25:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:25:05,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-01 18:25:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:05,464 INFO L225 Difference]: With dead ends: 3978 [2022-03-01 18:25:05,464 INFO L226 Difference]: Without dead ends: 3978 [2022-03-01 18:25:05,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:25:05,466 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:05,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 190 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:25:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-01 18:25:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-01 18:25:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-01 18:25:05,525 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-01 18:25:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:05,525 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-01 18:25:05,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:25:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-01 18:25:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:05,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:05,528 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, 1, 1] [2022-03-01 18:25:05,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:05,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:05,742 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1149654950, now seen corresponding path program 29 times [2022-03-01 18:25:05,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:05,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866655748] [2022-03-01 18:25:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:05,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:05,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866655748] [2022-03-01 18:25:05,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866655748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:05,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868475833] [2022-03-01 18:25:05,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:25:05,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:05,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:05,780 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) [2022-03-01 18:25:05,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:25:05,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:25:05,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:05,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:05,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:05,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868475833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:05,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:05,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:25:05,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66699175] [2022-03-01 18:25:05,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:05,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:25:05,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:25:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:25:05,939 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:25:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:06,336 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-01 18:25:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:25:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-01 18:25:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:06,342 INFO L225 Difference]: With dead ends: 3706 [2022-03-01 18:25:06,343 INFO L226 Difference]: Without dead ends: 3702 [2022-03-01 18:25:06,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:25:06,343 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:06,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 162 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-01 18:25:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-01 18:25:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-01 18:25:06,378 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-01 18:25:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:06,379 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-01 18:25:06,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:25:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-01 18:25:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:06,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:06,381 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, 1, 1] [2022-03-01 18:25:06,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:06,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:06,597 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1630220374, now seen corresponding path program 30 times [2022-03-01 18:25:06,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:06,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863304048] [2022-03-01 18:25:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:06,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:06,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863304048] [2022-03-01 18:25:06,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863304048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:06,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603270476] [2022-03-01 18:25:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:25:06,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:06,652 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) [2022-03-01 18:25:06,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:25:06,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:06,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:25:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603270476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:06,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:06,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:25:06,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119348729] [2022-03-01 18:25:06,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:06,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:25:06,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:25:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:25:06,771 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:25:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:07,232 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-01 18:25:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:25:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-01 18:25:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:07,240 INFO L225 Difference]: With dead ends: 4114 [2022-03-01 18:25:07,240 INFO L226 Difference]: Without dead ends: 4102 [2022-03-01 18:25:07,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:25:07,241 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 238 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:07,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 209 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-01 18:25:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-01 18:25:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-01 18:25:07,285 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-01 18:25:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:07,285 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-01 18:25:07,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:25:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-01 18:25:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:07,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:07,289 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, 1, 1] [2022-03-01 18:25:07,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:07,503 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,SelfDestructingSolverStorable35 [2022-03-01 18:25:07,504 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1067620206, now seen corresponding path program 31 times [2022-03-01 18:25:07,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:07,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951555593] [2022-03-01 18:25:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:07,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:07,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:07,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951555593] [2022-03-01 18:25:07,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951555593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:07,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086291044] [2022-03-01 18:25:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:25:07,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:07,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:07,542 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) [2022-03-01 18:25:07,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:25:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:07,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:07,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086291044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:07,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:07,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:25:07,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577067609] [2022-03-01 18:25:07,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:07,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:25:07,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:07,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:25:07,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:25:07,721 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 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) [2022-03-01 18:25:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:08,145 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-01 18:25:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:25:08,145 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 24 [2022-03-01 18:25:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:08,152 INFO L225 Difference]: With dead ends: 3694 [2022-03-01 18:25:08,152 INFO L226 Difference]: Without dead ends: 3694 [2022-03-01 18:25:08,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:25:08,153 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:08,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 240 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-01 18:25:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-01 18:25:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-01 18:25:08,193 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-01 18:25:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:08,193 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-01 18:25:08,193 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) [2022-03-01 18:25:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-01 18:25:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:08,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:08,196 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, 1, 1] [2022-03-01 18:25:08,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 18:25:08,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:25:08,413 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash 575418948, now seen corresponding path program 32 times [2022-03-01 18:25:08,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:08,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074713764] [2022-03-01 18:25:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:08,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:08,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:08,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074713764] [2022-03-01 18:25:08,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074713764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:08,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556501486] [2022-03-01 18:25:08,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:25:08,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:08,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:08,442 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) [2022-03-01 18:25:08,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:25:08,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:25:08,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:08,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:08,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556501486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:08,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:08,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:25:08,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411684870] [2022-03-01 18:25:08,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:08,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:25:08,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:25:08,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:25:08,576 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 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) [2022-03-01 18:25:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:09,204 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-01 18:25:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:25:09,204 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 24 [2022-03-01 18:25:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:09,211 INFO L225 Difference]: With dead ends: 3420 [2022-03-01 18:25:09,211 INFO L226 Difference]: Without dead ends: 3416 [2022-03-01 18:25:09,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:25:09,211 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 387 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:09,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 211 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-01 18:25:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-01 18:25:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-01 18:25:09,245 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-01 18:25:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:09,245 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-01 18:25:09,246 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) [2022-03-01 18:25:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-01 18:25:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:25:09,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:09,248 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, 1, 1] [2022-03-01 18:25:09,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 18:25:09,459 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,SelfDestructingSolverStorable37 [2022-03-01 18:25:09,460 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash -692038230, now seen corresponding path program 33 times [2022-03-01 18:25:09,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:09,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506413420] [2022-03-01 18:25:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:09,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:09,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506413420] [2022-03-01 18:25:09,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506413420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:09,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850689650] [2022-03-01 18:25:09,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:25:09,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:09,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:09,512 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) [2022-03-01 18:25:09,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:25:09,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:25:09,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:25:09,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:09,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:09,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850689650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:09,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:09,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:25:09,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52908496] [2022-03-01 18:25:09,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:09,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:25:09,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:25:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:25:09,672 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-03-01 18:25:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:10,171 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-01 18:25:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:25:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 24 [2022-03-01 18:25:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:10,177 INFO L225 Difference]: With dead ends: 3256 [2022-03-01 18:25:10,177 INFO L226 Difference]: Without dead ends: 3244 [2022-03-01 18:25:10,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:25:10,177 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 261 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:10,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 193 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:25:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-01 18:25:10,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-01 18:25:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-01 18:25:10,211 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-01 18:25:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:10,212 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-01 18:25:10,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-03-01 18:25:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-01 18:25:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:10,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:10,215 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, 1, 1, 1, 1] [2022-03-01 18:25:10,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:10,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:25:10,420 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1837488904, now seen corresponding path program 4 times [2022-03-01 18:25:10,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:10,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873714917] [2022-03-01 18:25:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:10,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:10,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:10,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873714917] [2022-03-01 18:25:10,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873714917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:10,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009450965] [2022-03-01 18:25:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:10,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:10,639 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) [2022-03-01 18:25:10,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:25:10,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:10,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:25:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:10,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:10,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-03-01 18:25:10,929 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:25:10,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-01 18:25:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:10,933 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 25 treesize of output 21 [2022-03-01 18:25:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:10,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:11,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:11,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:11,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-01 18:25:11,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:11,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-01 18:25:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:11,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:11,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:25:13,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:13,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:13,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:25:13,064 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:13,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:25:13,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:13,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:13,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:13,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:25:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:13,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009450965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:13,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:13,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:25:13,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879647832] [2022-03-01 18:25:13,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:13,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:25:13,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:25:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:25:13,392 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 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) [2022-03-01 18:25:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:15,083 INFO L93 Difference]: Finished difference Result 3843 states and 12416 transitions. [2022-03-01 18:25:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:25:15,083 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 26 [2022-03-01 18:25:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:15,090 INFO L225 Difference]: With dead ends: 3843 [2022-03-01 18:25:15,090 INFO L226 Difference]: Without dead ends: 3813 [2022-03-01 18:25:15,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 18:25:15,091 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 485 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:15,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 270 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:25:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-03-01 18:25:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1792. [2022-03-01 18:25:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-01 18:25:15,126 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-01 18:25:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:15,126 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-01 18:25:15,126 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) [2022-03-01 18:25:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-01 18:25:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:15,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:15,129 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, 1, 1, 1, 1] [2022-03-01 18:25:15,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:15,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:25:15,338 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash 429080376, now seen corresponding path program 5 times [2022-03-01 18:25:15,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:15,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500269893] [2022-03-01 18:25:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:15,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:15,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:15,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500269893] [2022-03-01 18:25:15,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500269893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:15,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644189985] [2022-03-01 18:25:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:25:15,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:15,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:15,561 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) [2022-03-01 18:25:15,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:25:15,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:25:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:25:15,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:15,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-01 18:25:15,869 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:25:15,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-01 18:25:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:15,872 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 20 treesize of output 16 [2022-03-01 18:25:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:15,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:16,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:16,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:16,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:25:16,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:16,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:25:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:16,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:16,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:25:17,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:17,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:17,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:17,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:25:17,357 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:17,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:25:17,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:17,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:17,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:17,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:25:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:17,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644189985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:17,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:17,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:25:17,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492143541] [2022-03-01 18:25:17,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:17,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:25:17,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:25:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:25:17,707 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:25:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:19,716 INFO L93 Difference]: Finished difference Result 4012 states and 12890 transitions. [2022-03-01 18:25:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:25:19,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-01 18:25:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:19,723 INFO L225 Difference]: With dead ends: 4012 [2022-03-01 18:25:19,723 INFO L226 Difference]: Without dead ends: 3997 [2022-03-01 18:25:19,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=779, Invalid=3253, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:25:19,724 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 480 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:19,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 261 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1125 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-03-01 18:25:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2022-03-01 18:25:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 1801. [2022-03-01 18:25:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.5861111111111112) internal successors, (6455), 1800 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6455 transitions. [2022-03-01 18:25:19,760 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6455 transitions. Word has length 26 [2022-03-01 18:25:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:19,761 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 6455 transitions. [2022-03-01 18:25:19,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:25:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6455 transitions. [2022-03-01 18:25:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:19,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:19,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:19,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:19,975 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,SelfDestructingSolverStorable40 [2022-03-01 18:25:19,976 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2020509684, now seen corresponding path program 34 times [2022-03-01 18:25:19,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:19,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545177012] [2022-03-01 18:25:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:20,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:20,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545177012] [2022-03-01 18:25:20,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545177012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:20,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841474494] [2022-03-01 18:25:20,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:20,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:20,242 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) [2022-03-01 18:25:20,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:25:20,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:20,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:25:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:20,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:20,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-01 18:25:20,509 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-03-01 18:25:20,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 33 [2022-03-01 18:25:20,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:20,511 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 20 treesize of output 16 [2022-03-01 18:25:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:20,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:20,695 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:25:20,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-01 18:25:20,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:20,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:25:20,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:20,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:20,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:20,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-01 18:25:21,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:21,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:21,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-01 18:25:21,387 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:25:21,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-03-01 18:25:21,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:21,389 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 17 treesize of output 11 [2022-03-01 18:25:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:21,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841474494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:21,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:21,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-01 18:25:21,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705212285] [2022-03-01 18:25:21,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:21,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:25:21,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:21,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:25:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:25:21,449 INFO L87 Difference]: Start difference. First operand 1801 states and 6455 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:23,748 INFO L93 Difference]: Finished difference Result 3548 states and 11961 transitions. [2022-03-01 18:25:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:25:23,749 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:25:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:23,755 INFO L225 Difference]: With dead ends: 3548 [2022-03-01 18:25:23,755 INFO L226 Difference]: Without dead ends: 3533 [2022-03-01 18:25:23,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:25:23,761 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 322 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:23,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 322 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:25:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-03-01 18:25:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 1853. [2022-03-01 18:25:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.576133909287257) internal successors, (6623), 1852 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6623 transitions. [2022-03-01 18:25:23,818 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6623 transitions. Word has length 26 [2022-03-01 18:25:23,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:23,819 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 6623 transitions. [2022-03-01 18:25:23,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6623 transitions. [2022-03-01 18:25:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:23,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:23,822 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, 1, 1, 1, 1] [2022-03-01 18:25:23,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:24,038 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,SelfDestructingSolverStorable41 [2022-03-01 18:25:24,039 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:24,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1469410436, now seen corresponding path program 6 times [2022-03-01 18:25:24,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:24,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821983734] [2022-03-01 18:25:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:24,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:24,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:24,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821983734] [2022-03-01 18:25:24,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821983734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:24,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972242056] [2022-03-01 18:25:24,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:25:24,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:24,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:24,234 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) [2022-03-01 18:25:24,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:25:24,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:25:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:25:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:24,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:24,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:24,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-01 18:25:24,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:24,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-01 18:25:24,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:24,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:24,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:25:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:24,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:24,740 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:25:24,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:25:24,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:24,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:25:24,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:24,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:24,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:25:25,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:25,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:25,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:25,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:25:25,976 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:25,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:25:25,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:25,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:25,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:25:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:26,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972242056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:26,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:26,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 18:25:26,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194428213] [2022-03-01 18:25:26,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:26,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:25:26,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:26,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:25:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:25:26,252 INFO L87 Difference]: Start difference. First operand 1853 states and 6623 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-01 18:25:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:30,113 INFO L93 Difference]: Finished difference Result 4499 states and 14387 transitions. [2022-03-01 18:25:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 18:25:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-03-01 18:25:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:30,122 INFO L225 Difference]: With dead ends: 4499 [2022-03-01 18:25:30,122 INFO L226 Difference]: Without dead ends: 4469 [2022-03-01 18:25:30,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1151, Invalid=7405, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:25:30,124 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 557 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:30,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 650 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:25:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-03-01 18:25:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 1877. [2022-03-01 18:25:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.5794243070362475) internal successors, (6715), 1876 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6715 transitions. [2022-03-01 18:25:30,164 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6715 transitions. Word has length 26 [2022-03-01 18:25:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:30,166 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6715 transitions. [2022-03-01 18:25:30,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-01 18:25:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6715 transitions. [2022-03-01 18:25:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:30,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:30,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:30,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:30,387 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,SelfDestructingSolverStorable42 [2022-03-01 18:25:30,387 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash 80971128, now seen corresponding path program 35 times [2022-03-01 18:25:30,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:30,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295016399] [2022-03-01 18:25:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:30,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:30,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:30,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295016399] [2022-03-01 18:25:30,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295016399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:30,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416066328] [2022-03-01 18:25:30,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:25:30,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:30,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:30,647 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) [2022-03-01 18:25:30,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:25:30,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:25:30,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:25:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:30,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:30,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:30,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:30,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-01 18:25:30,956 INFO L353 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2022-03-01 18:25:30,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2022-03-01 18:25:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:30,961 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 22 treesize of output 16 [2022-03-01 18:25:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:30,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:31,132 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:25:31,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-01 18:25:31,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:31,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:25:31,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:31,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:31,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:31,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-01 18:25:32,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:32,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:32,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-01 18:25:32,933 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:25:32,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-03-01 18:25:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:32,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-01 18:25:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:33,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416066328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:33,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:33,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-01 18:25:33,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055098093] [2022-03-01 18:25:33,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:33,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:25:33,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:25:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:25:33,023 INFO L87 Difference]: Start difference. First operand 1877 states and 6715 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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) [2022-03-01 18:25:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:36,304 INFO L93 Difference]: Finished difference Result 4376 states and 14404 transitions. [2022-03-01 18:25:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:25:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 26 [2022-03-01 18:25:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:36,312 INFO L225 Difference]: With dead ends: 4376 [2022-03-01 18:25:36,312 INFO L226 Difference]: Without dead ends: 4329 [2022-03-01 18:25:36,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1504, Invalid=7052, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:25:36,313 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 445 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:36,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 470 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:25:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2022-03-01 18:25:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 1914. [2022-03-01 18:25:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.5765812859383166) internal successors, (6842), 1913 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6842 transitions. [2022-03-01 18:25:36,390 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6842 transitions. Word has length 26 [2022-03-01 18:25:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:36,391 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 6842 transitions. [2022-03-01 18:25:36,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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) [2022-03-01 18:25:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6842 transitions. [2022-03-01 18:25:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:36,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:36,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:36,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 18:25:36,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:36,600 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash -895347716, now seen corresponding path program 36 times [2022-03-01 18:25:36,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:36,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240064381] [2022-03-01 18:25:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:36,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:36,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240064381] [2022-03-01 18:25:36,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240064381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:36,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430164259] [2022-03-01 18:25:36,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:25:36,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:36,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:36,917 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) [2022-03-01 18:25:36,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:25:36,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:25:36,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:25:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:37,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 74 [2022-03-01 18:25:37,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:37,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 124 [2022-03-01 18:25:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:37,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 145 [2022-03-01 18:25:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:40,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:40,269 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:25:40,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-01 18:25:40,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:40,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:25:40,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:40,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:40,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:40,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-01 18:25:42,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:42,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-03-01 18:25:42,311 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:25:42,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 36 [2022-03-01 18:25:42,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,314 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 17 treesize of output 11 [2022-03-01 18:25:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:42,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430164259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:42,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:42,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-03-01 18:25:42,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731929667] [2022-03-01 18:25:42,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:42,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:25:42,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:25:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:25:42,387 INFO L87 Difference]: Start difference. First operand 1914 states and 6842 transitions. Second operand has 25 states, 25 states have (on average 2.52) 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) [2022-03-01 18:25:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:53,081 INFO L93 Difference]: Finished difference Result 5648 states and 18021 transitions. [2022-03-01 18:25:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-01 18:25:53,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) 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 26 [2022-03-01 18:25:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:53,093 INFO L225 Difference]: With dead ends: 5648 [2022-03-01 18:25:53,094 INFO L226 Difference]: Without dead ends: 5588 [2022-03-01 18:25:53,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15357 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=4191, Invalid=33639, Unknown=0, NotChecked=0, Total=37830 [2022-03-01 18:25:53,096 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 755 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 4062 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 4062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:53,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 922 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 4062 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 18:25:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2022-03-01 18:25:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 2010. [2022-03-01 18:25:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.5614733698357393) internal successors, (7155), 2009 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7155 transitions. [2022-03-01 18:25:53,171 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7155 transitions. Word has length 26 [2022-03-01 18:25:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:53,171 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 7155 transitions. [2022-03-01 18:25:53,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) 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) [2022-03-01 18:25:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7155 transitions. [2022-03-01 18:25:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:53,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:53,175 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, 1, 1, 1, 1] [2022-03-01 18:25:53,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:53,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:53,387 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash -713845664, now seen corresponding path program 7 times [2022-03-01 18:25:53,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:53,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539750024] [2022-03-01 18:25:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:53,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:53,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:53,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539750024] [2022-03-01 18:25:53,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539750024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:53,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267506014] [2022-03-01 18:25:53,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:25:53,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:53,590 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) [2022-03-01 18:25:53,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:25:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:25:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:53,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:53,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-03-01 18:25:53,851 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:25:53,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-01 18:25:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:53,854 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 20 treesize of output 16 [2022-03-01 18:25:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:53,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:53,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:53,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:54,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:25:54,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:54,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:25:54,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:54,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:54,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:25:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:55,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:55,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:25:55,602 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:25:55,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:25:55,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:55,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:55,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:55,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:25:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:55,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267506014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:55,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:55,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:25:55,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560258356] [2022-03-01 18:25:55,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:55,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:25:55,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:25:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:25:55,856 INFO L87 Difference]: Start difference. First operand 2010 states and 7155 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:25:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:57,054 INFO L93 Difference]: Finished difference Result 3994 states and 13061 transitions. [2022-03-01 18:25:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:25:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-01 18:25:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:57,063 INFO L225 Difference]: With dead ends: 3994 [2022-03-01 18:25:57,063 INFO L226 Difference]: Without dead ends: 3979 [2022-03-01 18:25:57,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=591, Invalid=2379, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:25:57,064 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 465 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:57,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 276 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1062 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-03-01 18:25:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-03-01 18:25:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2041. [2022-03-01 18:25:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.556862745098039) internal successors, (7256), 2040 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7256 transitions. [2022-03-01 18:25:57,106 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7256 transitions. Word has length 26 [2022-03-01 18:25:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:57,106 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7256 transitions. [2022-03-01 18:25:57,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:25:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7256 transitions. [2022-03-01 18:25:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:25:57,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:57,110 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, 1, 1, 1, 1] [2022-03-01 18:25:57,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:57,326 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,SelfDestructingSolverStorable45 [2022-03-01 18:25:57,326 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2087213910, now seen corresponding path program 8 times [2022-03-01 18:25:57,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:57,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844344145] [2022-03-01 18:25:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:57,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:57,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844344145] [2022-03-01 18:25:57,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844344145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:57,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868389368] [2022-03-01 18:25:57,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:25:57,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:57,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:57,499 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) [2022-03-01 18:25:57,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:25:57,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:25:57,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:57,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:25:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:57,773 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-03-01 18:25:57,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 215 [2022-03-01 18:25:57,840 INFO L353 Elim1Store]: treesize reduction 39, result has 55.2 percent of original size [2022-03-01 18:25:57,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 132 [2022-03-01 18:25:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:57,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:57,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2022-03-01 18:25:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:57,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:58,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:58,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:58,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:58,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-03-01 18:25:58,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:58,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:25:58,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:58,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:58,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:58,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 103 [2022-03-01 18:25:58,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:58,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-01 18:25:58,461 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-03-01 18:25:58,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 35 [2022-03-01 18:25:58,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:58,465 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 17 treesize of output 11 [2022-03-01 18:25:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:58,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868389368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:58,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:58,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 18:25:58,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838174843] [2022-03-01 18:25:58,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:58,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:25:58,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:25:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:25:58,571 INFO L87 Difference]: Start difference. First operand 2041 states and 7256 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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) [2022-03-01 18:26:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:03,802 INFO L93 Difference]: Finished difference Result 4646 states and 15150 transitions. [2022-03-01 18:26:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:26:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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 26 [2022-03-01 18:26:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:03,813 INFO L225 Difference]: With dead ends: 4646 [2022-03-01 18:26:03,813 INFO L226 Difference]: Without dead ends: 4601 [2022-03-01 18:26:03,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1423, Invalid=8279, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 18:26:03,817 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 494 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1150 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:03,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 782 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2046 Invalid, 0 Unknown, 1150 Unchecked, 1.0s Time] [2022-03-01 18:26:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-03-01 18:26:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2094. [2022-03-01 18:26:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.560917343526039) internal successors, (7453), 2093 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7453 transitions. [2022-03-01 18:26:03,868 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7453 transitions. Word has length 26 [2022-03-01 18:26:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:03,868 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7453 transitions. [2022-03-01 18:26:03,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 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) [2022-03-01 18:26:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7453 transitions. [2022-03-01 18:26:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:03,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:03,872 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, 1, 1, 1, 1] [2022-03-01 18:26:03,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:04,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:26:04,084 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1088334556, now seen corresponding path program 9 times [2022-03-01 18:26:04,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:04,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397553622] [2022-03-01 18:26:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:04,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:04,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:04,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397553622] [2022-03-01 18:26:04,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397553622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:04,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101848354] [2022-03-01 18:26:04,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:26:04,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:04,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:04,268 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) [2022-03-01 18:26:04,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:26:04,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:26:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:26:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:04,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:04,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-01 18:26:04,541 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:26:04,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-01 18:26:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:04,544 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 20 treesize of output 16 [2022-03-01 18:26:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:04,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:04,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:04,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:26:04,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:04,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:26:04,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:04,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:04,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:06,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:06,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:06,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:06,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:06,599 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:06,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:06,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:06,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:06,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:06,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:06,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101848354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:06,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:06,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:26:06,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297150160] [2022-03-01 18:26:06,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:06,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:26:06,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:26:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:26:06,882 INFO L87 Difference]: Start difference. First operand 2094 states and 7453 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:26:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:09,140 INFO L93 Difference]: Finished difference Result 4343 states and 14153 transitions. [2022-03-01 18:26:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:26:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-01 18:26:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:09,149 INFO L225 Difference]: With dead ends: 4343 [2022-03-01 18:26:09,149 INFO L226 Difference]: Without dead ends: 4328 [2022-03-01 18:26:09,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=957, Invalid=3735, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:26:09,152 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 531 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:09,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 314 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1190 Invalid, 0 Unknown, 291 Unchecked, 0.6s Time] [2022-03-01 18:26:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-03-01 18:26:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 2101. [2022-03-01 18:26:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 3.5642857142857145) internal successors, (7485), 2100 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 7485 transitions. [2022-03-01 18:26:09,208 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 7485 transitions. Word has length 26 [2022-03-01 18:26:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:09,209 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 7485 transitions. [2022-03-01 18:26:09,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:26:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 7485 transitions. [2022-03-01 18:26:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:09,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:09,213 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, 1, 1, 1, 1] [2022-03-01 18:26:09,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:09,422 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,SelfDestructingSolverStorable47 [2022-03-01 18:26:09,422 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1589099960, now seen corresponding path program 10 times [2022-03-01 18:26:09,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:09,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24805024] [2022-03-01 18:26:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:09,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:09,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:09,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24805024] [2022-03-01 18:26:09,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24805024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:09,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259538184] [2022-03-01 18:26:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:26:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:09,626 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) [2022-03-01 18:26:09,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:26:09,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:26:09,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:09,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:26:09,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:09,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:09,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-03-01 18:26:09,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:09,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-03-01 18:26:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:09,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:09,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:26:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:09,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:10,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:26:10,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:26:10,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:10,789 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:10,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:10,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:10,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:10,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:11,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259538184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:11,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:11,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:26:11,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142041623] [2022-03-01 18:26:11,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:11,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:26:11,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:26:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:26:11,217 INFO L87 Difference]: Start difference. First operand 2101 states and 7485 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) [2022-03-01 18:26:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:13,831 INFO L93 Difference]: Finished difference Result 4739 states and 15412 transitions. [2022-03-01 18:26:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:26:13,831 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 26 [2022-03-01 18:26:13,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:13,840 INFO L225 Difference]: With dead ends: 4739 [2022-03-01 18:26:13,840 INFO L226 Difference]: Without dead ends: 4709 [2022-03-01 18:26:13,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1158, Invalid=4392, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:26:13,840 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 622 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:13,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 423 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1454 Invalid, 0 Unknown, 245 Unchecked, 0.7s Time] [2022-03-01 18:26:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4709 states. [2022-03-01 18:26:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4709 to 2096. [2022-03-01 18:26:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.562291169451074) internal successors, (7463), 2095 states have internal predecessors, (7463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7463 transitions. [2022-03-01 18:26:13,898 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7463 transitions. Word has length 26 [2022-03-01 18:26:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:13,898 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7463 transitions. [2022-03-01 18:26:13,898 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) [2022-03-01 18:26:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7463 transitions. [2022-03-01 18:26:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:13,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:13,902 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, 1, 1, 1, 1] [2022-03-01 18:26:13,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:14,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:14,118 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash -455050340, now seen corresponding path program 11 times [2022-03-01 18:26:14,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:14,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695651721] [2022-03-01 18:26:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:14,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:14,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695651721] [2022-03-01 18:26:14,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695651721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:14,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611407799] [2022-03-01 18:26:14,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:26:14,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:14,382 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) [2022-03-01 18:26:14,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:26:14,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:26:14,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:14,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:26:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:14,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:14,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-03-01 18:26:14,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:14,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-01 18:26:14,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:14,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:14,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:26:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:14,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:14,992 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:26:14,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:26:15,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:15,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:26:15,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:15,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:15,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:17,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:17,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:18,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:18,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:18,054 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:18,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:18,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:18,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:18,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:18,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:18,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611407799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:18,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:18,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 18:26:18,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653229156] [2022-03-01 18:26:18,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:18,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:26:18,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:26:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:26:18,310 INFO L87 Difference]: Start difference. First operand 2096 states and 7463 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-01 18:26:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:21,126 INFO L93 Difference]: Finished difference Result 4040 states and 13349 transitions. [2022-03-01 18:26:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:26:21,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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 26 [2022-03-01 18:26:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:21,135 INFO L225 Difference]: With dead ends: 4040 [2022-03-01 18:26:21,136 INFO L226 Difference]: Without dead ends: 4010 [2022-03-01 18:26:21,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=663, Invalid=4307, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:26:21,136 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 281 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:21,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:26:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-03-01 18:26:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 2094. [2022-03-01 18:26:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 3.5618729096989967) internal successors, (7455), 2093 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) [2022-03-01 18:26:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 7455 transitions. [2022-03-01 18:26:21,188 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 7455 transitions. Word has length 26 [2022-03-01 18:26:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:21,188 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 7455 transitions. [2022-03-01 18:26:21,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2022-03-01 18:26:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 7455 transitions. [2022-03-01 18:26:21,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:21,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:21,192 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, 1, 1, 1, 1] [2022-03-01 18:26:21,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:21,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 18:26:21,408 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2073438884, now seen corresponding path program 12 times [2022-03-01 18:26:21,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:21,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067769394] [2022-03-01 18:26:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:21,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:21,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067769394] [2022-03-01 18:26:21,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067769394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:21,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13721738] [2022-03-01 18:26:21,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:26:21,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:21,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:21,623 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) [2022-03-01 18:26:21,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:26:21,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:26:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:26:21,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:21,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:21,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-01 18:26:21,948 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:26:21,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 32 [2022-03-01 18:26:21,950 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 25 treesize of output 21 [2022-03-01 18:26:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:21,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:22,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:22,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-01 18:26:22,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:22,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-01 18:26:22,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:22,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:22,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:23,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:23,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:23,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:23,512 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:23,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:23,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:23,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:23,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:23,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13721738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:23,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:23,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 18:26:23,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041896188] [2022-03-01 18:26:23,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:23,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:26:23,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:23,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:26:23,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:26:23,937 INFO L87 Difference]: Start difference. First operand 2094 states and 7455 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) [2022-03-01 18:26:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:26,249 INFO L93 Difference]: Finished difference Result 4187 states and 13537 transitions. [2022-03-01 18:26:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:26:26,250 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 26 [2022-03-01 18:26:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:26,257 INFO L225 Difference]: With dead ends: 4187 [2022-03-01 18:26:26,257 INFO L226 Difference]: Without dead ends: 4095 [2022-03-01 18:26:26,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=615, Invalid=2691, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:26:26,257 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 277 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:26,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 397 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:26:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-03-01 18:26:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 2238. [2022-03-01 18:26:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.545820295037997) internal successors, (7932), 2237 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 7932 transitions. [2022-03-01 18:26:26,302 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 7932 transitions. Word has length 26 [2022-03-01 18:26:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:26,302 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 7932 transitions. [2022-03-01 18:26:26,302 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) [2022-03-01 18:26:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 7932 transitions. [2022-03-01 18:26:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:26,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:26,306 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, 1, 1, 1, 1] [2022-03-01 18:26:26,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:26,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:26,516 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash 560738446, now seen corresponding path program 13 times [2022-03-01 18:26:26,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:26,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201884840] [2022-03-01 18:26:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:26,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:26,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:26,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201884840] [2022-03-01 18:26:26,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201884840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:26,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837839127] [2022-03-01 18:26:26,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:26:26,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:26,740 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) [2022-03-01 18:26:26,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:26:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:26:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:26,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:26,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:26,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-03-01 18:26:26,940 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:26:26,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-01 18:26:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:26,943 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 25 treesize of output 21 [2022-03-01 18:26:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:26,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:27,122 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:26:27,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:26:27,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:27,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:26:27,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:27,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:27,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:29,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:29,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:29,755 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:29,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:29,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:29,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:29,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:30,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837839127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:30,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:30,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 18:26:30,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287055661] [2022-03-01 18:26:30,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:30,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:26:30,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:26:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:26:30,100 INFO L87 Difference]: Start difference. First operand 2238 states and 7932 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:26:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:32,854 INFO L93 Difference]: Finished difference Result 4478 states and 14711 transitions. [2022-03-01 18:26:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:26:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-01 18:26:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:32,861 INFO L225 Difference]: With dead ends: 4478 [2022-03-01 18:26:32,862 INFO L226 Difference]: Without dead ends: 4438 [2022-03-01 18:26:32,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=858, Invalid=4842, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 18:26:32,862 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 301 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:32,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 456 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:26:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-03-01 18:26:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 2306. [2022-03-01 18:26:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.547939262472885) internal successors, (8178), 2305 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8178 transitions. [2022-03-01 18:26:32,905 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8178 transitions. Word has length 26 [2022-03-01 18:26:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:32,905 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 8178 transitions. [2022-03-01 18:26:32,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:26:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8178 transitions. [2022-03-01 18:26:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:32,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:32,909 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, 1, 1, 1, 1] [2022-03-01 18:26:32,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-01 18:26:33,123 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,SelfDestructingSolverStorable51 [2022-03-01 18:26:33,124 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1495978748, now seen corresponding path program 14 times [2022-03-01 18:26:33,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:33,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699557095] [2022-03-01 18:26:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:33,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:33,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699557095] [2022-03-01 18:26:33,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699557095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:33,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505033877] [2022-03-01 18:26:33,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:26:33,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:33,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:33,327 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) [2022-03-01 18:26:33,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:26:33,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:26:33,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:26:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:33,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:33,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:33,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-01 18:26:33,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:33,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 66 [2022-03-01 18:26:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:33,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:33,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:26:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:33,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:33,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:33,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-01 18:26:33,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:33,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-01 18:26:33,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:33,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:33,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:35,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:35,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:35,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:35,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:35,242 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:35,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:35,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:35,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:35,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:35,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:35,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505033877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:35,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:35,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 18:26:35,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282384051] [2022-03-01 18:26:35,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:35,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:26:35,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:26:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:26:35,572 INFO L87 Difference]: Start difference. First operand 2306 states and 8178 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) [2022-03-01 18:26:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:37,818 INFO L93 Difference]: Finished difference Result 4536 states and 14768 transitions. [2022-03-01 18:26:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:26:37,818 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 26 [2022-03-01 18:26:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:37,839 INFO L225 Difference]: With dead ends: 4536 [2022-03-01 18:26:37,840 INFO L226 Difference]: Without dead ends: 4447 [2022-03-01 18:26:37,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=932, Invalid=3898, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:26:37,840 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 412 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:37,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 225 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 856 Invalid, 0 Unknown, 166 Unchecked, 0.5s Time] [2022-03-01 18:26:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2022-03-01 18:26:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 2342. [2022-03-01 18:26:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 3.552755232806493) internal successors, (8317), 2341 states have internal predecessors, (8317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 8317 transitions. [2022-03-01 18:26:37,894 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 8317 transitions. Word has length 26 [2022-03-01 18:26:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:37,894 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 8317 transitions. [2022-03-01 18:26:37,894 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) [2022-03-01 18:26:37,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 8317 transitions. [2022-03-01 18:26:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:37,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:37,898 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, 1, 1, 1, 1] [2022-03-01 18:26:37,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:38,111 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,SelfDestructingSolverStorable52 [2022-03-01 18:26:38,111 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:38,112 INFO L85 PathProgramCache]: Analyzing trace with hash 961943836, now seen corresponding path program 15 times [2022-03-01 18:26:38,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:38,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279418620] [2022-03-01 18:26:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:38,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:38,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:38,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279418620] [2022-03-01 18:26:38,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279418620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:38,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049483633] [2022-03-01 18:26:38,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:26:38,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:38,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:38,323 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) [2022-03-01 18:26:38,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:26:38,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:26:38,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:26:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:40,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-01 18:26:40,129 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:26:40,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-01 18:26:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:40,133 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 20 treesize of output 16 [2022-03-01 18:26:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:40,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:40,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:40,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-03-01 18:26:40,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:40,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-03-01 18:26:40,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:40,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-03-01 18:26:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:45,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049483633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:45,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:45,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:26:45,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286098478] [2022-03-01 18:26:45,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:45,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:26:45,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:26:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-03-01 18:26:45,771 INFO L87 Difference]: Start difference. First operand 2342 states and 8317 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:26:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:49,660 INFO L93 Difference]: Finished difference Result 4016 states and 13362 transitions. [2022-03-01 18:26:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:26:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 26 [2022-03-01 18:26:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:49,667 INFO L225 Difference]: With dead ends: 4016 [2022-03-01 18:26:49,668 INFO L226 Difference]: Without dead ends: 3983 [2022-03-01 18:26:49,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=594, Invalid=2483, Unknown=3, NotChecked=0, Total=3080 [2022-03-01 18:26:49,669 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:49,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 244 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 708 Invalid, 0 Unknown, 356 Unchecked, 0.4s Time] [2022-03-01 18:26:49,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-03-01 18:26:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 2371. [2022-03-01 18:26:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.5544303797468353) internal successors, (8424), 2370 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 8424 transitions. [2022-03-01 18:26:49,740 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 8424 transitions. Word has length 26 [2022-03-01 18:26:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:49,740 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 8424 transitions. [2022-03-01 18:26:49,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2022-03-01 18:26:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 8424 transitions. [2022-03-01 18:26:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:49,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:49,744 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, 1, 1, 1, 1] [2022-03-01 18:26:49,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:49,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:49,960 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash -655588944, now seen corresponding path program 16 times [2022-03-01 18:26:49,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:49,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878715295] [2022-03-01 18:26:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:50,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:50,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878715295] [2022-03-01 18:26:50,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878715295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:50,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745254349] [2022-03-01 18:26:50,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:26:50,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:50,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:50,173 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) [2022-03-01 18:26:50,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:26:50,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:26:50,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:50,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:26:50,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:50,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:50,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-01 18:26:50,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:50,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-01 18:26:50,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:50,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:50,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:26:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:50,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:50,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:50,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:50,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:26:50,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:50,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:26:50,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:50,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:50,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:51,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:51,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:51,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:51,526 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:51,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:51,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:51,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:51,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:51,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:51,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745254349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:51,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:51,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:26:51,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868540436] [2022-03-01 18:26:51,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:51,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:26:51,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:26:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:26:51,859 INFO L87 Difference]: Start difference. First operand 2371 states and 8424 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) [2022-03-01 18:26:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:53,789 INFO L93 Difference]: Finished difference Result 4739 states and 15611 transitions. [2022-03-01 18:26:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:26:53,789 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 26 [2022-03-01 18:26:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:53,797 INFO L225 Difference]: With dead ends: 4739 [2022-03-01 18:26:53,797 INFO L226 Difference]: Without dead ends: 4695 [2022-03-01 18:26:53,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:26:53,798 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 490 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:53,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 283 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 881 Invalid, 0 Unknown, 339 Unchecked, 0.4s Time] [2022-03-01 18:26:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-03-01 18:26:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 2402. [2022-03-01 18:26:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 3.5622657226155767) internal successors, (8553), 2401 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 8553 transitions. [2022-03-01 18:26:53,846 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 8553 transitions. Word has length 26 [2022-03-01 18:26:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:53,846 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 8553 transitions. [2022-03-01 18:26:53,846 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) [2022-03-01 18:26:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 8553 transitions. [2022-03-01 18:26:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:26:53,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:53,850 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, 1, 1, 1, 1] [2022-03-01 18:26:53,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:54,059 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,SelfDestructingSolverStorable54 [2022-03-01 18:26:54,059 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1949435448, now seen corresponding path program 17 times [2022-03-01 18:26:54,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:54,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650101160] [2022-03-01 18:26:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:54,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:54,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:54,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650101160] [2022-03-01 18:26:54,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650101160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:54,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868019541] [2022-03-01 18:26:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:26:54,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:54,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:54,284 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) [2022-03-01 18:26:54,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:26:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:54,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:26:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:26:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:56,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:56,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:56,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-01 18:26:56,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:56,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-01 18:26:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:26:56,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:56,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:26:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:57,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:57,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:57,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:57,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-01 18:26:57,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:57,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 106 [2022-03-01 18:26:57,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:57,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:57,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:26:57,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:57,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:57,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:57,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:26:57,807 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:26:57,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:26:57,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:57,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:57,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:57,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:26:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:58,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868019541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:58,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:58,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:26:58,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827438368] [2022-03-01 18:26:58,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:58,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:26:58,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:26:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=496, Unknown=2, NotChecked=0, Total=600 [2022-03-01 18:26:58,255 INFO L87 Difference]: Start difference. First operand 2402 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-03-01 18:27:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:00,936 INFO L93 Difference]: Finished difference Result 4699 states and 15443 transitions. [2022-03-01 18:27:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:27:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 26 [2022-03-01 18:27:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:00,946 INFO L225 Difference]: With dead ends: 4699 [2022-03-01 18:27:00,946 INFO L226 Difference]: Without dead ends: 4617 [2022-03-01 18:27:00,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1030, Invalid=5130, Unknown=2, NotChecked=0, Total=6162 [2022-03-01 18:27:00,951 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 410 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:00,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 331 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1217 Invalid, 0 Unknown, 378 Unchecked, 0.7s Time] [2022-03-01 18:27:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2022-03-01 18:27:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2487. [2022-03-01 18:27:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 3.5595333869670154) internal successors, (8849), 2486 states have internal predecessors, (8849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 8849 transitions. [2022-03-01 18:27:01,002 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 8849 transitions. Word has length 26 [2022-03-01 18:27:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:01,002 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 8849 transitions. [2022-03-01 18:27:01,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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) [2022-03-01 18:27:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 8849 transitions. [2022-03-01 18:27:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:27:01,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:01,006 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, 1, 1, 1, 1] [2022-03-01 18:27:01,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:01,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 18:27:01,209 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash 702714798, now seen corresponding path program 18 times [2022-03-01 18:27:01,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:01,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124929163] [2022-03-01 18:27:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:01,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:01,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124929163] [2022-03-01 18:27:01,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124929163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:01,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704305046] [2022-03-01 18:27:01,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:27:01,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:01,447 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) [2022-03-01 18:27:01,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:27:01,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:27:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:01,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:27:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:03,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:03,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:03,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-03-01 18:27:03,343 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-01 18:27:03,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-01 18:27:03,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:03,346 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 20 treesize of output 16 [2022-03-01 18:27:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:03,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:03,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:03,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 117 [2022-03-01 18:27:03,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:03,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 111 [2022-03-01 18:27:03,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:03,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 115 [2022-03-01 18:27:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:52,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704305046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:52,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:52,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:27:52,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960706879] [2022-03-01 18:27:52,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:52,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:27:52,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:27:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=484, Unknown=1, NotChecked=0, Total=600 [2022-03-01 18:27:52,860 INFO L87 Difference]: Start difference. First operand 2487 states and 8849 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) [2022-03-01 18:27:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:57,074 INFO L93 Difference]: Finished difference Result 4278 states and 14188 transitions. [2022-03-01 18:27:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:27:57,075 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 26 [2022-03-01 18:27:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:57,082 INFO L225 Difference]: With dead ends: 4278 [2022-03-01 18:27:57,082 INFO L226 Difference]: Without dead ends: 4245 [2022-03-01 18:27:57,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=609, Invalid=2580, Unknown=3, NotChecked=0, Total=3192 [2022-03-01 18:27:57,083 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 314 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:57,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 288 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 712 Invalid, 0 Unknown, 317 Unchecked, 0.4s Time] [2022-03-01 18:27:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2022-03-01 18:27:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 2488. [2022-03-01 18:27:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 3.560514676316848) internal successors, (8855), 2487 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 8855 transitions. [2022-03-01 18:27:57,128 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 8855 transitions. Word has length 26 [2022-03-01 18:27:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:57,129 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 8855 transitions. [2022-03-01 18:27:57,129 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) [2022-03-01 18:27:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 8855 transitions. [2022-03-01 18:27:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:27:57,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:57,132 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, 1, 1, 1, 1] [2022-03-01 18:27:57,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:57,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:57,348 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:57,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:57,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1481820314, now seen corresponding path program 19 times [2022-03-01 18:27:57,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:57,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463619257] [2022-03-01 18:27:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:57,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:57,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:57,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463619257] [2022-03-01 18:27:57,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463619257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:57,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683328490] [2022-03-01 18:27:57,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:27:57,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:57,567 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) [2022-03-01 18:27:57,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:27:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:27:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:57,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:57,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:57,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-03-01 18:27:57,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:57,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-01 18:27:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:57,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:57,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-01 18:27:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:57,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:58,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:58,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:58,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-01 18:27:58,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:58,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 107 [2022-03-01 18:27:58,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:58,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:58,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-01 18:28:00,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:00,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:00,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 72 [2022-03-01 18:28:00,476 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-01 18:28:00,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2022-03-01 18:28:00,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:00,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:00,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:00,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-01 18:28:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:28:00,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683328490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:28:00,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:28:00,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:28:00,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875531827] [2022-03-01 18:28:00,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:28:00,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:28:00,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:28:00,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:28:00,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:28:00,931 INFO L87 Difference]: Start difference. First operand 2488 states and 8855 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) [2022-03-01 18:28:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:28:03,428 INFO L93 Difference]: Finished difference Result 4800 states and 15839 transitions. [2022-03-01 18:28:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:28:03,428 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 26 [2022-03-01 18:28:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:28:03,437 INFO L225 Difference]: With dead ends: 4800 [2022-03-01 18:28:03,437 INFO L226 Difference]: Without dead ends: 4764 [2022-03-01 18:28:03,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=966, Invalid=3726, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:28:03,438 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 495 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:28:03,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 304 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 921 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-03-01 18:28:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2022-03-01 18:28:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 2490. [2022-03-01 18:28:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 3.56046605062274) internal successors, (8862), 2489 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:28:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 8862 transitions. [2022-03-01 18:28:03,490 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 8862 transitions. Word has length 26 [2022-03-01 18:28:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:28:03,490 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 8862 transitions. [2022-03-01 18:28:03,490 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) [2022-03-01 18:28:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 8862 transitions. [2022-03-01 18:28:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:28:03,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:28:03,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:28:03,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 18:28:03,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:28:03,707 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:28:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:28:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2089528438, now seen corresponding path program 37 times [2022-03-01 18:28:03,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:28:03,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829704570] [2022-03-01 18:28:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:28:03,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:28:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:28:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:28:03,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:28:03,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829704570] [2022-03-01 18:28:03,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829704570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:28:03,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935970000] [2022-03-01 18:28:03,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:28:03,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:28:03,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:28:03,946 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) [2022-03-01 18:28:03,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:28:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:28:03,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:28:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:28:04,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:04,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:04,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:04,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 68 [2022-03-01 18:28:04,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:04,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 118 [2022-03-01 18:28:04,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:04,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:04,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-03-01 18:28:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:28:04,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:28:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:04,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:04,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:04,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 68 [2022-03-01 18:28:04,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:04,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-01 18:28:04,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:04,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:04,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 97 [2022-03-01 18:28:05,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:05,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:05,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-03-01 18:28:05,257 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:28:05,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2022-03-01 18:28:05,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:05,263 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 17 treesize of output 11 [2022-03-01 18:28:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:28:05,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935970000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:28:05,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:28:05,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:28:05,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926544158] [2022-03-01 18:28:05,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:28:05,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:28:05,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:28:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:28:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:28:05,409 INFO L87 Difference]: Start difference. First operand 2490 states and 8862 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) [2022-03-01 18:28:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:28:07,404 INFO L93 Difference]: Finished difference Result 4251 states and 14249 transitions. [2022-03-01 18:28:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 18:28:07,404 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 26 [2022-03-01 18:28:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:28:07,412 INFO L225 Difference]: With dead ends: 4251 [2022-03-01 18:28:07,412 INFO L226 Difference]: Without dead ends: 4206 [2022-03-01 18:28:07,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=809, Invalid=3883, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:28:07,413 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 342 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:28:07,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 308 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:28:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2022-03-01 18:28:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 2520. [2022-03-01 18:28:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 3.55577610162763) internal successors, (8957), 2519 states have internal predecessors, (8957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:28:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 8957 transitions. [2022-03-01 18:28:07,456 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 8957 transitions. Word has length 26 [2022-03-01 18:28:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:28:07,456 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 8957 transitions. [2022-03-01 18:28:07,456 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) [2022-03-01 18:28:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 8957 transitions. [2022-03-01 18:28:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:28:07,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:28:07,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:28:07,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 18:28:07,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:28:07,662 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:28:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:28:07,662 INFO L85 PathProgramCache]: Analyzing trace with hash -971763080, now seen corresponding path program 38 times [2022-03-01 18:28:07,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:28:07,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015563336] [2022-03-01 18:28:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:28:07,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:28:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:28:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:28:07,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:28:07,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015563336] [2022-03-01 18:28:07,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015563336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:28:07,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830516065] [2022-03-01 18:28:07,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:28:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:28:07,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:28:07,899 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) [2022-03-01 18:28:07,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:28:07,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:28:07,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:28:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:28:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:28:08,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:08,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:08,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 65 [2022-03-01 18:28:08,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:08,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 115 [2022-03-01 18:28:08,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:08,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:28:08,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-03-01 18:28:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:28:08,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:28:18,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:18,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:28:18,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 75 [2022-03-01 18:28:18,944 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-01 18:28:18,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 45 [2022-03-01 18:28:18,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:28:18,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-01 18:28:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:28:18,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830516065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:28:18,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:28:18,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-03-01 18:28:18,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912288864] [2022-03-01 18:28:18,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:28:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:28:18,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:28:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:28:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=500, Unknown=8, NotChecked=0, Total=600 [2022-03-01 18:28:18,983 INFO L87 Difference]: Start difference. First operand 2520 states and 8957 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:28:21,512 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3))) (< c_i c_N) (not (< c_k c_N))) (<= 0 c_M)) is different from false [2022-03-01 18:28:23,391 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* (- 1) (select (select c_mult (select c_A 1)) (select c_B 1))) c_res1) (select (select c_mult (select c_A 0)) (select c_B 0))) (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (= 2 c_i) (< 1 c_N) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M) (= c_res2 (let ((.cse4 (+ (- 1) c_k))) (select (select c_mult (select c_A .cse4)) (select c_B .cse4))))) is different from false [2022-03-01 18:28:24,814 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((k Int)) (or (<= (+ 2 k) c_i) (let ((.cse1 (+ c_res2 (select (select c_mult (select c_A k)) (select c_B k)) (let ((.cse2 (+ k 1))) (select (select c_mult (select c_A .cse2)) (select c_B .cse2))))) (.cse0 (+ (select (select c_mult (select c_A c_i)) (select c_B c_i)) c_res1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_i k))) (or (<= (+ 2 c_k) c_N) (let ((.cse3 (+ c_res2 (select (select c_mult (select c_A c_k)) (select c_B c_k))))) (and (<= .cse3 c_res1) (<= c_res1 .cse3)))) (<= 0 c_M)) is different from false [2022-03-01 18:28:45,429 WARN L228 SmtUtils]: Spent 16.97s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:29:11,244 WARN L228 SmtUtils]: Spent 16.63s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:29:38,239 WARN L228 SmtUtils]: Spent 14.00s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-01 18:29:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:29:38,370 INFO L93 Difference]: Finished difference Result 6301 states and 20785 transitions. [2022-03-01 18:29:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 18:29:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:29:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:29:38,382 INFO L225 Difference]: With dead ends: 6301 [2022-03-01 18:29:38,383 INFO L226 Difference]: Without dead ends: 6133 [2022-03-01 18:29:38,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 88.9s TimeCoverageRelationStatistics Valid=890, Invalid=5572, Unknown=30, NotChecked=480, Total=6972 [2022-03-01 18:29:38,383 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 364 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:29:38,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 547 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1869 Invalid, 0 Unknown, 416 Unchecked, 0.9s Time] [2022-03-01 18:29:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-03-01 18:29:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 2611. [2022-03-01 18:29:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.539463601532567) internal successors, (9238), 2610 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:29:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 9238 transitions. [2022-03-01 18:29:38,450 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 9238 transitions. Word has length 26 [2022-03-01 18:29:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:29:38,450 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 9238 transitions. [2022-03-01 18:29:38,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:29:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 9238 transitions. [2022-03-01 18:29:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:29:38,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:29:38,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:29:38,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 18:29:38,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 18:29:38,659 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:29:38,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:29:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash 96111484, now seen corresponding path program 39 times [2022-03-01 18:29:38,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:29:38,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417179235] [2022-03-01 18:29:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:29:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:29:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:29:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:29:38,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:29:38,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417179235] [2022-03-01 18:29:38,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417179235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:29:38,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461625721] [2022-03-01 18:29:38,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:29:38,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:29:38,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:29:38,916 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) [2022-03-01 18:29:38,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:29:38,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:29:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:29:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:29:38,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:29:39,303 INFO L353 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-03-01 18:29:39,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 225 [2022-03-01 18:29:39,334 INFO L353 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2022-03-01 18:29:39,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 151 [2022-03-01 18:29:39,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:29:39,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:29:39,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:29:39,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 Received shutdown request... [2022-03-01 18:39:05,906 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 [2022-03-01 18:39:05,908 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-01 18:39:05,910 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:39:05,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:05,938 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:39:06,123 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,SelfDestructingSolverStorable60 [2022-03-01 18:39:06,123 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 8ms.. [2022-03-01 18:39:06,125 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:39:06,125 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:39:06,125 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:39:06,127 INFO L732 BasicCegarLoop]: Path program histogram: [39, 19, 1, 1, 1] [2022-03-01 18:39:06,129 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:39:06,129 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:39:06,130 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:39:06 BasicIcfg [2022-03-01 18:39:06,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:39:06,130 INFO L158 Benchmark]: Toolchain (without parser) took 878682.04ms. Allocated memory was 172.0MB in the beginning and 660.6MB in the end (delta: 488.6MB). Free memory was 131.1MB in the beginning and 380.6MB in the end (delta: -249.4MB). Peak memory consumption was 415.4MB. Max. memory is 8.0GB. [2022-03-01 18:39:06,130 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 172.0MB. Free memory is still 132.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:39:06,131 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.46ms. Allocated memory is still 172.0MB. Free memory was 131.0MB in the beginning and 129.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:39:06,131 INFO L158 Benchmark]: Boogie Preprocessor took 14.09ms. Allocated memory is still 172.0MB. Free memory was 129.6MB in the beginning and 128.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-01 18:39:06,131 INFO L158 Benchmark]: RCFGBuilder took 241.92ms. Allocated memory is still 172.0MB. Free memory was 128.6MB in the beginning and 119.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:39:06,131 INFO L158 Benchmark]: TraceAbstraction took 878401.86ms. Allocated memory was 172.0MB in the beginning and 660.6MB in the end (delta: 488.6MB). Free memory was 118.7MB in the beginning and 380.6MB in the end (delta: -261.9MB). Peak memory consumption was 402.8MB. Max. memory is 8.0GB. [2022-03-01 18:39:06,131 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 0.10ms. Allocated memory is still 172.0MB. Free memory is still 132.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.46ms. Allocated memory is still 172.0MB. Free memory was 131.0MB in the beginning and 129.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 14.09ms. Allocated memory is still 172.0MB. Free memory was 129.6MB in the beginning and 128.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 241.92ms. Allocated memory is still 172.0MB. Free memory was 128.6MB in the beginning and 119.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 878401.86ms. Allocated memory was 172.0MB in the beginning and 660.6MB in the end (delta: 488.6MB). Free memory was 118.7MB in the beginning and 380.6MB in the end (delta: -261.9MB). Peak memory consumption was 402.8MB. 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: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 8ms.. - TimeoutResultAtElement [Line: 60]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 8ms.. - TimeoutResultAtElement [Line: 60]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 8ms.. - TimeoutResultAtElement [Line: 61]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 8ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 878.3s, OverallIterations: 61, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.2s, AutomataDifference: 164.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19519 SdHoareTripleChecker+Valid, 23.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19519 mSDsluCounter, 14459 SdHoareTripleChecker+Invalid, 20.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4427 IncrementalHoareTripleChecker+Unchecked, 25530 mSDsCounter, 3947 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51087 IncrementalHoareTripleChecker+Invalid, 59461 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3947 mSolverCounterUnsat, 1424 mSDtfsCounter, 51087 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5461 GetRequests, 2127 SyntacticMatches, 165 SemanticMatches, 3169 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 79105 ImplicationChecksByTransitivity, 162.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2611occurred in iteration=60, InterpolantAutomatonStates: 2707, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 60 MinimizatonAttempts, 98568 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 129.3s InterpolantComputationTime, 2854 NumberOfCodeBlocks, 2848 NumberOfCodeBlocksAsserted, 180 NumberOfCheckSat, 4078 ConstructedInterpolants, 35 QuantifiedInterpolants, 59352 SizeOfPredicates, 654 NumberOfNonLiveVariables, 3533 ConjunctsInSsa, 846 ConjunctsInUnsatCore, 174 InterpolantComputations, 3 PerfectInterpolantSequences, 174/878 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 [2022-03-01 18:24:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:26,082 INFO L93 Difference]: Finished difference Result 64406 states and 236826 transitions. [2022-03-01 18:24:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:24:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:26,310 INFO L225 Difference]: With dead ends: 64406 [2022-03-01 18:24:26,311 INFO L226 Difference]: Without dead ends: 64399 [2022-03-01 18:24:26,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1015, Invalid=2767, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 18:24:26,311 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 399 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:26,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 632 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:24:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64399 states. [2022-03-01 18:24:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64399 to 43080. [2022-03-01 18:24:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43080 states, 43079 states have (on average 3.7062605910072195) internal successors, (159662), 43079 states have internal predecessors, (159662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43080 states to 43080 states and 159662 transitions. [2022-03-01 18:24:27,694 INFO L78 Accepts]: Start accepts. Automaton has 43080 states and 159662 transitions. Word has length 35 [2022-03-01 18:24:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:27,694 INFO L470 AbstractCegarLoop]: Abstraction has 43080 states and 159662 transitions. [2022-03-01 18:24:27,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 43080 states and 159662 transitions. [2022-03-01 18:24:27,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:24:27,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:27,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:27,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:27,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:27,974 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:27,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:27,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2116825229, now seen corresponding path program 43 times [2022-03-01 18:24:27,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:27,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454813234] [2022-03-01 18:24:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:27,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:28,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:28,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454813234] [2022-03-01 18:24:28,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454813234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:28,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680125632] [2022-03-01 18:24:28,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:28,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:28,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:28,204 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) [2022-03-01 18:24:28,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 18:24:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:24:28,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:28,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:28,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:28,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:28,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680125632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:28,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:28,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:24:28,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597869208] [2022-03-01 18:24:28,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:28,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:24:28,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:24:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:24:28,949 INFO L87 Difference]: Start difference. First operand 43080 states and 159662 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:30,966 INFO L93 Difference]: Finished difference Result 64156 states and 236197 transitions. [2022-03-01 18:24:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:24:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:31,206 INFO L225 Difference]: With dead ends: 64156 [2022-03-01 18:24:31,207 INFO L226 Difference]: Without dead ends: 64156 [2022-03-01 18:24:31,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1077, Invalid=2583, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:24:31,207 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 438 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:31,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 440 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1309 Invalid, 0 Unknown, 302 Unchecked, 0.6s Time] [2022-03-01 18:24:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64156 states. [2022-03-01 18:24:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64156 to 43080. [2022-03-01 18:24:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43080 states, 43079 states have (on average 3.7062605910072195) internal successors, (159662), 43079 states have internal predecessors, (159662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43080 states to 43080 states and 159662 transitions. [2022-03-01 18:24:32,711 INFO L78 Accepts]: Start accepts. Automaton has 43080 states and 159662 transitions. Word has length 35 [2022-03-01 18:24:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:32,711 INFO L470 AbstractCegarLoop]: Abstraction has 43080 states and 159662 transitions. [2022-03-01 18:24:32,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43080 states and 159662 transitions. [2022-03-01 18:24:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:24:32,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:32,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:32,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:32,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:32,995 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1779348875, now seen corresponding path program 44 times [2022-03-01 18:24:32,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:32,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968180038] [2022-03-01 18:24:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:33,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:33,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968180038] [2022-03-01 18:24:33,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968180038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:33,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651775816] [2022-03-01 18:24:33,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:33,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:33,178 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) [2022-03-01 18:24:33,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 18:24:33,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:33,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:24:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:33,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:33,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:33,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 18:24:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:33,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651775816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:33,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:33,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-01 18:24:33,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119485648] [2022-03-01 18:24:33,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:33,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:24:33,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:24:33,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:24:33,635 INFO L87 Difference]: Start difference. First operand 43080 states and 159662 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:34,783 INFO L93 Difference]: Finished difference Result 63996 states and 235715 transitions. [2022-03-01 18:24:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:24:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:35,005 INFO L225 Difference]: With dead ends: 63996 [2022-03-01 18:24:35,006 INFO L226 Difference]: Without dead ends: 63988 [2022-03-01 18:24:35,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:24:35,006 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 344 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:35,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 290 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 642 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-03-01 18:24:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63988 states. [2022-03-01 18:24:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63988 to 43088. [2022-03-01 18:24:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43088 states, 43087 states have (on average 3.705943788149558) internal successors, (159678), 43087 states have internal predecessors, (159678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43088 states to 43088 states and 159678 transitions. [2022-03-01 18:24:36,423 INFO L78 Accepts]: Start accepts. Automaton has 43088 states and 159678 transitions. Word has length 35 [2022-03-01 18:24:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:36,423 INFO L470 AbstractCegarLoop]: Abstraction has 43088 states and 159678 transitions. [2022-03-01 18:24:36,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 43088 states and 159678 transitions. [2022-03-01 18:24:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:24:36,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:36,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:36,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:36,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:36,706 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1165076745, now seen corresponding path program 45 times [2022-03-01 18:24:36,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:36,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793415060] [2022-03-01 18:24:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:36,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:37,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:37,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793415060] [2022-03-01 18:24:37,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793415060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:37,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527356976] [2022-03-01 18:24:37,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:37,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:37,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:37,156 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) [2022-03-01 18:24:37,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 18:24:37,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:24:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:24:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:37,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:37,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 18:24:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:37,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527356976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:37,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:37,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-01 18:24:37,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071478804] [2022-03-01 18:24:37,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:37,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:24:37,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:24:37,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:24:37,606 INFO L87 Difference]: Start difference. First operand 43088 states and 159678 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:38,989 INFO L93 Difference]: Finished difference Result 64520 states and 237181 transitions. [2022-03-01 18:24:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:24:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:39,226 INFO L225 Difference]: With dead ends: 64520 [2022-03-01 18:24:39,227 INFO L226 Difference]: Without dead ends: 64520 [2022-03-01 18:24:39,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=544, Invalid=1808, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:24:39,227 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 444 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:39,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 410 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 827 Invalid, 0 Unknown, 372 Unchecked, 0.4s Time] [2022-03-01 18:24:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64520 states. [2022-03-01 18:24:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64520 to 43118. [2022-03-01 18:24:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43118 states, 43117 states have (on average 3.7054294129925553) internal successors, (159767), 43117 states have internal predecessors, (159767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43118 states to 43118 states and 159767 transitions. [2022-03-01 18:24:40,701 INFO L78 Accepts]: Start accepts. Automaton has 43118 states and 159767 transitions. Word has length 35 [2022-03-01 18:24:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:40,702 INFO L470 AbstractCegarLoop]: Abstraction has 43118 states and 159767 transitions. [2022-03-01 18:24:40,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 43118 states and 159767 transitions. [2022-03-01 18:24:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:24:40,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:40,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:40,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-01 18:24:40,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:40,978 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1209012939, now seen corresponding path program 46 times [2022-03-01 18:24:40,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:40,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601011901] [2022-03-01 18:24:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:40,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:41,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:41,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601011901] [2022-03-01 18:24:41,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601011901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:41,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46533529] [2022-03-01 18:24:41,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:41,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:41,152 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) [2022-03-01 18:24:41,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 18:24:41,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:41,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:41,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:24:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:41,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:41,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:41,412 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 11 treesize of output 15 [2022-03-01 18:24:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:41,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46533529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:41,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:41,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-01 18:24:41,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360938456] [2022-03-01 18:24:41,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:41,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:24:41,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:24:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:24:41,518 INFO L87 Difference]: Start difference. First operand 43118 states and 159767 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:43,121 INFO L93 Difference]: Finished difference Result 64646 states and 237514 transitions. [2022-03-01 18:24:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:24:43,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:43,356 INFO L225 Difference]: With dead ends: 64646 [2022-03-01 18:24:43,356 INFO L226 Difference]: Without dead ends: 64622 [2022-03-01 18:24:43,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:24:43,357 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 395 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:43,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 636 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:24:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64622 states. [2022-03-01 18:24:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64622 to 43210. [2022-03-01 18:24:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 3.703233122729061) internal successors, (160013), 43209 states have internal predecessors, (160013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 160013 transitions. [2022-03-01 18:24:44,789 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 160013 transitions. Word has length 35 [2022-03-01 18:24:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:44,789 INFO L470 AbstractCegarLoop]: Abstraction has 43210 states and 160013 transitions. [2022-03-01 18:24:44,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 160013 transitions. [2022-03-01 18:24:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:24:44,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:44,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:44,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:45,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:45,067 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1512527511, now seen corresponding path program 47 times [2022-03-01 18:24:45,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:45,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604803895] [2022-03-01 18:24:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:45,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:45,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:45,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604803895] [2022-03-01 18:24:45,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604803895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:45,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265749105] [2022-03-01 18:24:45,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:45,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:45,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:45,541 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) [2022-03-01 18:24:45,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 18:24:45,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:24:45,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:45,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:24:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:45,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:45,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:45,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:46,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265749105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:46,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:46,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:24:46,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132473721] [2022-03-01 18:24:46,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:46,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:24:46,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:24:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:24:46,033 INFO L87 Difference]: Start difference. First operand 43210 states and 160013 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:47,910 INFO L93 Difference]: Finished difference Result 74097 states and 272683 transitions. [2022-03-01 18:24:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:24:47,910 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:48,188 INFO L225 Difference]: With dead ends: 74097 [2022-03-01 18:24:48,188 INFO L226 Difference]: Without dead ends: 74097 [2022-03-01 18:24:48,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=2752, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:24:48,189 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 516 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:48,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 606 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1373 Invalid, 0 Unknown, 413 Unchecked, 0.6s Time] [2022-03-01 18:24:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74097 states. [2022-03-01 18:24:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74097 to 43382. [2022-03-01 18:24:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43382 states, 43381 states have (on average 3.7003065858325073) internal successors, (160523), 43381 states have internal predecessors, (160523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43382 states to 43382 states and 160523 transitions. [2022-03-01 18:24:49,627 INFO L78 Accepts]: Start accepts. Automaton has 43382 states and 160523 transitions. Word has length 35 [2022-03-01 18:24:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:49,627 INFO L470 AbstractCegarLoop]: Abstraction has 43382 states and 160523 transitions. [2022-03-01 18:24:49,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 43382 states and 160523 transitions. [2022-03-01 18:24:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:24:49,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:49,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:49,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-01 18:24:49,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:49,906 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:49,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1344601857, now seen corresponding path program 48 times [2022-03-01 18:24:49,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:49,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253137834] [2022-03-01 18:24:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:50,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253137834] [2022-03-01 18:24:50,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253137834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:50,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085373617] [2022-03-01 18:24:50,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:50,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:50,077 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) [2022-03-01 18:24:50,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 18:24:50,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:24:50,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:50,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:24:50,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:50,629 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 18:24:50,629 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 11 treesize of output 11 [2022-03-01 18:24:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:50,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:50,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 18:24:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:50,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085373617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:50,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:50,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-03-01 18:24:50,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595250713] [2022-03-01 18:24:50,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:50,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:24:50,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:50,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:24:50,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:24:50,976 INFO L87 Difference]: Start difference. First operand 43382 states and 160523 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:54,515 INFO L93 Difference]: Finished difference Result 58813 states and 214790 transitions. [2022-03-01 18:24:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 18:24:54,516 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:54,707 INFO L225 Difference]: With dead ends: 58813 [2022-03-01 18:24:54,708 INFO L226 Difference]: Without dead ends: 58753 [2022-03-01 18:24:54,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2275, Invalid=7625, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 18:24:54,708 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1043 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 2965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1659 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:54,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 825 Invalid, 2965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1206 Invalid, 0 Unknown, 1659 Unchecked, 0.6s Time] [2022-03-01 18:24:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58753 states. [2022-03-01 18:24:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58753 to 43973. [2022-03-01 18:24:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43973 states, 43972 states have (on average 3.700354771218048) internal successors, (162712), 43972 states have internal predecessors, (162712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43973 states to 43973 states and 162712 transitions. [2022-03-01 18:24:56,058 INFO L78 Accepts]: Start accepts. Automaton has 43973 states and 162712 transitions. Word has length 35 [2022-03-01 18:24:56,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:56,058 INFO L470 AbstractCegarLoop]: Abstraction has 43973 states and 162712 transitions. [2022-03-01 18:24:56,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43973 states and 162712 transitions. [2022-03-01 18:24:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:24:56,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:56,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:56,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-01 18:24:56,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-01 18:24:56,343 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1973292741, now seen corresponding path program 49 times [2022-03-01 18:24:56,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:56,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585392270] [2022-03-01 18:24:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:56,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585392270] [2022-03-01 18:24:56,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585392270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:56,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781040289] [2022-03-01 18:24:56,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:56,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:56,776 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) [2022-03-01 18:24:56,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 18:24:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:24:56,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:57,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:57,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:57,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:24:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:57,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781040289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:57,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:57,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-01 18:24:57,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709409785] [2022-03-01 18:24:57,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:57,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:24:57,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:57,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:24:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:24:57,216 INFO L87 Difference]: Start difference. First operand 43973 states and 162712 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:59,212 INFO L93 Difference]: Finished difference Result 66340 states and 243630 transitions. [2022-03-01 18:24:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:24:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:24:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:59,442 INFO L225 Difference]: With dead ends: 66340 [2022-03-01 18:24:59,443 INFO L226 Difference]: Without dead ends: 66320 [2022-03-01 18:24:59,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=980, Invalid=3052, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:24:59,443 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 560 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:59,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 554 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:24:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66320 states. [2022-03-01 18:25:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66320 to 44145. [2022-03-01 18:25:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44145 states, 44144 states have (on average 3.6985773831098223) internal successors, (163270), 44144 states have internal predecessors, (163270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44145 states to 44145 states and 163270 transitions. [2022-03-01 18:25:00,883 INFO L78 Accepts]: Start accepts. Automaton has 44145 states and 163270 transitions. Word has length 35 [2022-03-01 18:25:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:00,883 INFO L470 AbstractCegarLoop]: Abstraction has 44145 states and 163270 transitions. [2022-03-01 18:25:00,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 44145 states and 163270 transitions. [2022-03-01 18:25:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:00,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:00,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:00,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:01,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-01 18:25:01,176 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1280544777, now seen corresponding path program 50 times [2022-03-01 18:25:01,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:01,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756029384] [2022-03-01 18:25:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:01,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:01,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756029384] [2022-03-01 18:25:01,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756029384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:01,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454875590] [2022-03-01 18:25:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:25:01,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:01,356 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) [2022-03-01 18:25:01,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 18:25:01,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:25:01,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:25:01,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:01,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:01,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:01,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:25:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:02,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454875590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:02,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:02,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 18:25:02,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449171030] [2022-03-01 18:25:02,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:02,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:25:02,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:25:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:25:02,038 INFO L87 Difference]: Start difference. First operand 44145 states and 163270 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:04,029 INFO L93 Difference]: Finished difference Result 65706 states and 241329 transitions. [2022-03-01 18:25:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:25:04,030 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:04,262 INFO L225 Difference]: With dead ends: 65706 [2022-03-01 18:25:04,262 INFO L226 Difference]: Without dead ends: 65706 [2022-03-01 18:25:04,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1237, Invalid=3319, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 18:25:04,262 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 526 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:04,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 295 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:25:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65706 states. [2022-03-01 18:25:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65706 to 44309. [2022-03-01 18:25:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 3.6951792001444432) internal successors, (163726), 44308 states have internal predecessors, (163726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 163726 transitions. [2022-03-01 18:25:05,735 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 163726 transitions. Word has length 35 [2022-03-01 18:25:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:05,736 INFO L470 AbstractCegarLoop]: Abstraction has 44309 states and 163726 transitions. [2022-03-01 18:25:05,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 163726 transitions. [2022-03-01 18:25:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:05,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:05,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:05,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-01 18:25:06,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:06,016 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 131954993, now seen corresponding path program 51 times [2022-03-01 18:25:06,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:06,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167409772] [2022-03-01 18:25:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:06,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:06,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167409772] [2022-03-01 18:25:06,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167409772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:06,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964529368] [2022-03-01 18:25:06,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:25:06,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:06,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:06,199 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) [2022-03-01 18:25:06,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 18:25:06,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:25:06,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:25:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:06,443 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 18:25:06,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-03-01 18:25:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:06,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:06,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:25:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964529368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:06,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:06,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 29 [2022-03-01 18:25:06,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312973159] [2022-03-01 18:25:06,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:06,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:25:06,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:25:06,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:25:06,732 INFO L87 Difference]: Start difference. First operand 44309 states and 163726 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:10,858 INFO L93 Difference]: Finished difference Result 61049 states and 221919 transitions. [2022-03-01 18:25:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:25:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:11,079 INFO L225 Difference]: With dead ends: 61049 [2022-03-01 18:25:11,079 INFO L226 Difference]: Without dead ends: 61029 [2022-03-01 18:25:11,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3175 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2462, Invalid=8250, Unknown=0, NotChecked=0, Total=10712 [2022-03-01 18:25:11,080 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1344 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:11,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1344 Valid, 644 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:25:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61029 states. [2022-03-01 18:25:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61029 to 44557. [2022-03-01 18:25:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44557 states, 44556 states have (on average 3.6950354609929077) internal successors, (164636), 44556 states have internal predecessors, (164636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44557 states to 44557 states and 164636 transitions. [2022-03-01 18:25:12,497 INFO L78 Accepts]: Start accepts. Automaton has 44557 states and 164636 transitions. Word has length 35 [2022-03-01 18:25:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:12,498 INFO L470 AbstractCegarLoop]: Abstraction has 44557 states and 164636 transitions. [2022-03-01 18:25:12,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 44557 states and 164636 transitions. [2022-03-01 18:25:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:12,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:12,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:12,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:12,784 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,SelfDestructingSolverStorable191 [2022-03-01 18:25:12,784 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1578785049, now seen corresponding path program 52 times [2022-03-01 18:25:12,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:12,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429609439] [2022-03-01 18:25:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:12,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:12,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429609439] [2022-03-01 18:25:12,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429609439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:12,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128647720] [2022-03-01 18:25:12,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:12,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:12,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:12,972 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) [2022-03-01 18:25:12,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 18:25:12,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:12,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:25:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:13,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:13,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:13,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:25:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:13,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128647720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:13,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:13,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2022-03-01 18:25:13,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562203130] [2022-03-01 18:25:13,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:13,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:25:13,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:25:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:25:13,677 INFO L87 Difference]: Start difference. First operand 44557 states and 164636 transitions. Second operand has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:15,561 INFO L93 Difference]: Finished difference Result 75142 states and 276398 transitions. [2022-03-01 18:25:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:25:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:15,834 INFO L225 Difference]: With dead ends: 75142 [2022-03-01 18:25:15,835 INFO L226 Difference]: Without dead ends: 75128 [2022-03-01 18:25:15,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=850, Invalid=2810, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:25:15,835 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 573 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:15,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 432 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:25:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75128 states. [2022-03-01 18:25:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75128 to 44447. [2022-03-01 18:25:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44447 states, 44446 states have (on average 3.696778112766053) internal successors, (164307), 44446 states have internal predecessors, (164307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44447 states to 44447 states and 164307 transitions. [2022-03-01 18:25:17,307 INFO L78 Accepts]: Start accepts. Automaton has 44447 states and 164307 transitions. Word has length 35 [2022-03-01 18:25:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:17,307 INFO L470 AbstractCegarLoop]: Abstraction has 44447 states and 164307 transitions. [2022-03-01 18:25:17,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 44447 states and 164307 transitions. [2022-03-01 18:25:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:17,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:17,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:17,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-01 18:25:17,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:17,584 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash -510841067, now seen corresponding path program 53 times [2022-03-01 18:25:17,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:17,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227765269] [2022-03-01 18:25:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:17,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:17,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:17,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227765269] [2022-03-01 18:25:17,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227765269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:17,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302587689] [2022-03-01 18:25:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:25:17,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:17,765 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) [2022-03-01 18:25:17,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 18:25:17,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:25:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:25:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:17,989 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 18:25:17,989 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-03-01 18:25:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:18,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:18,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:18,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 18:25:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:18,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302587689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:18,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:18,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 29 [2022-03-01 18:25:18,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578513291] [2022-03-01 18:25:18,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:18,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:25:18,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:25:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:25:18,503 INFO L87 Difference]: Start difference. First operand 44447 states and 164307 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:25,164 INFO L93 Difference]: Finished difference Result 70236 states and 252101 transitions. [2022-03-01 18:25:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-01 18:25:25,164 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:25,412 INFO L225 Difference]: With dead ends: 70236 [2022-03-01 18:25:25,412 INFO L226 Difference]: Without dead ends: 70212 [2022-03-01 18:25:25,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9262 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6084, Invalid=18722, Unknown=0, NotChecked=0, Total=24806 [2022-03-01 18:25:25,413 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1143 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3947 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 4120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:25,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 1310 Invalid, 4120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3947 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 18:25:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70212 states. [2022-03-01 18:25:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70212 to 44856. [2022-03-01 18:25:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44856 states, 44855 states have (on average 3.693791104670605) internal successors, (165685), 44855 states have internal predecessors, (165685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44856 states to 44856 states and 165685 transitions. [2022-03-01 18:25:26,929 INFO L78 Accepts]: Start accepts. Automaton has 44856 states and 165685 transitions. Word has length 35 [2022-03-01 18:25:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:26,929 INFO L470 AbstractCegarLoop]: Abstraction has 44856 states and 165685 transitions. [2022-03-01 18:25:26,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 44856 states and 165685 transitions. [2022-03-01 18:25:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:27,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:27,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:27,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-01 18:25:27,214 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,SelfDestructingSolverStorable193 [2022-03-01 18:25:27,214 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash 935988989, now seen corresponding path program 54 times [2022-03-01 18:25:27,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:27,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663829913] [2022-03-01 18:25:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:27,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:27,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:27,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663829913] [2022-03-01 18:25:27,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663829913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:27,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155820596] [2022-03-01 18:25:27,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:25:27,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:27,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:27,655 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) [2022-03-01 18:25:27,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 18:25:27,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:25:27,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:25:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:27,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:28,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:28,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:25:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:28,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155820596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:28,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:28,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-03-01 18:25:28,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979431775] [2022-03-01 18:25:28,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:28,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:25:28,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:28,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:25:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:25:28,217 INFO L87 Difference]: Start difference. First operand 44856 states and 165685 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 30 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:36,203 INFO L93 Difference]: Finished difference Result 79773 states and 294163 transitions. [2022-03-01 18:25:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-03-01 18:25:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 30 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:36,708 INFO L225 Difference]: With dead ends: 79773 [2022-03-01 18:25:36,708 INFO L226 Difference]: Without dead ends: 79753 [2022-03-01 18:25:36,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14247 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6762, Invalid=27278, Unknown=0, NotChecked=0, Total=34040 [2022-03-01 18:25:36,710 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 2278 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 4222 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2278 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 4585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 4222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:36,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2278 Valid, 1269 Invalid, 4585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 4222 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 18:25:36,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79753 states. [2022-03-01 18:25:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79753 to 47478. [2022-03-01 18:25:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47478 states, 47477 states have (on average 3.6953682835899486) internal successors, (175445), 47477 states have internal predecessors, (175445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47478 states to 47478 states and 175445 transitions. [2022-03-01 18:25:38,382 INFO L78 Accepts]: Start accepts. Automaton has 47478 states and 175445 transitions. Word has length 35 [2022-03-01 18:25:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:38,383 INFO L470 AbstractCegarLoop]: Abstraction has 47478 states and 175445 transitions. [2022-03-01 18:25:38,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 30 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47478 states and 175445 transitions. [2022-03-01 18:25:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:38,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:38,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:38,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-01 18:25:38,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:38,678 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash -857357653, now seen corresponding path program 55 times [2022-03-01 18:25:38,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:38,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648474487] [2022-03-01 18:25:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:38,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:38,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648474487] [2022-03-01 18:25:38,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648474487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:38,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563224857] [2022-03-01 18:25:38,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:25:38,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:38,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:38,880 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) [2022-03-01 18:25:38,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 18:25:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:25:38,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:39,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:39,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:39,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 18:25:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:25:39,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563224857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:39,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:39,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2022-03-01 18:25:39,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140501324] [2022-03-01 18:25:39,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:39,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:25:39,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:25:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:25:39,684 INFO L87 Difference]: Start difference. First operand 47478 states and 175445 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:41,566 INFO L93 Difference]: Finished difference Result 69495 states and 255481 transitions. [2022-03-01 18:25:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:25:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:41,839 INFO L225 Difference]: With dead ends: 69495 [2022-03-01 18:25:41,839 INFO L226 Difference]: Without dead ends: 69487 [2022-03-01 18:25:41,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2630, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:25:41,840 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 543 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:41,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 447 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:25:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69487 states. [2022-03-01 18:25:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69487 to 47608. [2022-03-01 18:25:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47608 states, 47607 states have (on average 3.693910559371521) internal successors, (175856), 47607 states have internal predecessors, (175856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47608 states to 47608 states and 175856 transitions. [2022-03-01 18:25:43,392 INFO L78 Accepts]: Start accepts. Automaton has 47608 states and 175856 transitions. Word has length 35 [2022-03-01 18:25:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:43,392 INFO L470 AbstractCegarLoop]: Abstraction has 47608 states and 175856 transitions. [2022-03-01 18:25:43,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 47608 states and 175856 transitions. [2022-03-01 18:25:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:43,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:43,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:43,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:43,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:43,731 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1295459391, now seen corresponding path program 56 times [2022-03-01 18:25:43,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:43,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082678999] [2022-03-01 18:25:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:43,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:43,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082678999] [2022-03-01 18:25:43,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082678999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:43,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474927803] [2022-03-01 18:25:43,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:25:43,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:43,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:43,926 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) [2022-03-01 18:25:43,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 18:25:43,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:25:43,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:25:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:44,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:44,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:44,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:25:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:44,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474927803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:44,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:44,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-03-01 18:25:44,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573649266] [2022-03-01 18:25:44,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:44,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:25:44,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:25:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:25:44,693 INFO L87 Difference]: Start difference. First operand 47608 states and 175856 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:46,992 INFO L93 Difference]: Finished difference Result 70209 states and 257193 transitions. [2022-03-01 18:25:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:25:46,993 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:47,250 INFO L225 Difference]: With dead ends: 70209 [2022-03-01 18:25:47,250 INFO L226 Difference]: Without dead ends: 70209 [2022-03-01 18:25:47,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1290, Invalid=4112, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:25:47,250 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 541 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:47,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 462 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:25:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70209 states. [2022-03-01 18:25:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70209 to 47558. [2022-03-01 18:25:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47558 states, 47557 states have (on average 3.6943667598881342) internal successors, (175693), 47557 states have internal predecessors, (175693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47558 states to 47558 states and 175693 transitions. [2022-03-01 18:25:48,761 INFO L78 Accepts]: Start accepts. Automaton has 47558 states and 175693 transitions. Word has length 35 [2022-03-01 18:25:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:48,761 INFO L470 AbstractCegarLoop]: Abstraction has 47558 states and 175693 transitions. [2022-03-01 18:25:48,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 47558 states and 175693 transitions. [2022-03-01 18:25:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:48,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:48,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:48,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:49,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:49,062 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash -996856757, now seen corresponding path program 57 times [2022-03-01 18:25:49,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:49,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816262949] [2022-03-01 18:25:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:49,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:49,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:49,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816262949] [2022-03-01 18:25:49,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816262949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:49,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84889322] [2022-03-01 18:25:49,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:25:49,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:49,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:49,509 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) [2022-03-01 18:25:49,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 18:25:49,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:25:49,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:49,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:25:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:49,754 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 18:25:49,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-03-01 18:25:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:49,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:49,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:49,869 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 [2022-03-01 18:25:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:50,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84889322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:50,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:50,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-03-01 18:25:50,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221341154] [2022-03-01 18:25:50,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:50,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:25:50,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:25:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:25:50,056 INFO L87 Difference]: Start difference. First operand 47558 states and 175693 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:54,211 INFO L93 Difference]: Finished difference Result 65219 states and 236996 transitions. [2022-03-01 18:25:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 18:25:54,211 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:54,442 INFO L225 Difference]: With dead ends: 65219 [2022-03-01 18:25:54,442 INFO L226 Difference]: Without dead ends: 65199 [2022-03-01 18:25:54,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3635 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2869, Invalid=8903, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 18:25:54,443 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1283 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:54,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1283 Valid, 633 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1966 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:25:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65199 states. [2022-03-01 18:25:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65199 to 47800. [2022-03-01 18:25:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47800 states, 47799 states have (on average 3.693550074269336) internal successors, (176548), 47799 states have internal predecessors, (176548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47800 states to 47800 states and 176548 transitions. [2022-03-01 18:25:56,158 INFO L78 Accepts]: Start accepts. Automaton has 47800 states and 176548 transitions. Word has length 35 [2022-03-01 18:25:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:56,158 INFO L470 AbstractCegarLoop]: Abstraction has 47800 states and 176548 transitions. [2022-03-01 18:25:56,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 47800 states and 176548 transitions. [2022-03-01 18:25:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:25:56,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:56,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:56,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-01 18:25:56,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:56,448 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash 449973299, now seen corresponding path program 58 times [2022-03-01 18:25:56,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:56,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788829544] [2022-03-01 18:25:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:56,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:56,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:56,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788829544] [2022-03-01 18:25:56,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788829544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:56,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196957258] [2022-03-01 18:25:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:56,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:56,641 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) [2022-03-01 18:25:56,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 18:25:56,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:56,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:25:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:56,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:56,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:56,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:25:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:57,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196957258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:57,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:57,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:25:57,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055841659] [2022-03-01 18:25:57,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:57,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:25:57,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:57,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:25:57,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:25:57,123 INFO L87 Difference]: Start difference. First operand 47800 states and 176548 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:59,308 INFO L93 Difference]: Finished difference Result 80391 states and 294888 transitions. [2022-03-01 18:25:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:25:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:25:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:59,861 INFO L225 Difference]: With dead ends: 80391 [2022-03-01 18:25:59,861 INFO L226 Difference]: Without dead ends: 80328 [2022-03-01 18:25:59,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1116, Invalid=3996, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:25:59,861 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 566 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:59,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 544 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:25:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80328 states. [2022-03-01 18:26:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80328 to 47832. [2022-03-01 18:26:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47832 states, 47831 states have (on average 3.6934205849762707) internal successors, (176660), 47831 states have internal predecessors, (176660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47832 states to 47832 states and 176660 transitions. [2022-03-01 18:26:01,511 INFO L78 Accepts]: Start accepts. Automaton has 47832 states and 176660 transitions. Word has length 35 [2022-03-01 18:26:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:01,512 INFO L470 AbstractCegarLoop]: Abstraction has 47832 states and 176660 transitions. [2022-03-01 18:26:01,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 47832 states and 176660 transitions. [2022-03-01 18:26:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:01,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:01,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:01,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-01 18:26:01,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:01,805 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:01,805 INFO L85 PathProgramCache]: Analyzing trace with hash 732371081, now seen corresponding path program 59 times [2022-03-01 18:26:01,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:01,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925901395] [2022-03-01 18:26:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:01,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:01,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:01,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925901395] [2022-03-01 18:26:01,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925901395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:01,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81289062] [2022-03-01 18:26:01,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:26:01,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:01,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:01,992 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) [2022-03-01 18:26:01,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 18:26:02,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:26:02,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:02,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:26:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:02,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:02,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:02,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:26:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:02,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81289062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:02,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:02,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 18:26:02,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701601457] [2022-03-01 18:26:02,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:02,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:26:02,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:02,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:26:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:26:02,670 INFO L87 Difference]: Start difference. First operand 47832 states and 176660 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:04,517 INFO L93 Difference]: Finished difference Result 72246 states and 264017 transitions. [2022-03-01 18:26:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:26:04,517 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:26:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:04,822 INFO L225 Difference]: With dead ends: 72246 [2022-03-01 18:26:04,822 INFO L226 Difference]: Without dead ends: 72246 [2022-03-01 18:26:04,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=709, Invalid=2483, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:26:04,822 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 445 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:04,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 500 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:26:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72246 states. [2022-03-01 18:26:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72246 to 47904. [2022-03-01 18:26:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47904 states, 47903 states have (on average 3.692169592718619) internal successors, (176866), 47903 states have internal predecessors, (176866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47904 states to 47904 states and 176866 transitions. [2022-03-01 18:26:06,317 INFO L78 Accepts]: Start accepts. Automaton has 47904 states and 176866 transitions. Word has length 35 [2022-03-01 18:26:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:06,317 INFO L470 AbstractCegarLoop]: Abstraction has 47904 states and 176866 transitions. [2022-03-01 18:26:06,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 47904 states and 176866 transitions. [2022-03-01 18:26:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:06,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:06,418 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:06,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:06,618 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,SelfDestructingSolverStorable199 [2022-03-01 18:26:06,618 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash -887201175, now seen corresponding path program 60 times [2022-03-01 18:26:06,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:06,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094100086] [2022-03-01 18:26:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:06,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:06,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:06,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094100086] [2022-03-01 18:26:06,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094100086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:06,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399803266] [2022-03-01 18:26:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:26:06,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:06,799 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) [2022-03-01 18:26:06,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 18:26:06,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:26:06,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:26:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:07,046 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 18:26:07,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-03-01 18:26:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:07,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:07,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:07,412 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 14 treesize of output 18 [2022-03-01 18:26:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:07,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399803266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:07,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:07,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-03-01 18:26:07,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597702498] [2022-03-01 18:26:07,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:07,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:26:07,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:26:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:26:07,580 INFO L87 Difference]: Start difference. First operand 47904 states and 176866 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:11,862 INFO L93 Difference]: Finished difference Result 70964 states and 255634 transitions. [2022-03-01 18:26:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:26:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:26:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:12,087 INFO L225 Difference]: With dead ends: 70964 [2022-03-01 18:26:12,087 INFO L226 Difference]: Without dead ends: 70928 [2022-03-01 18:26:12,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3211 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2423, Invalid=8497, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 18:26:12,088 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1248 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 3366 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 3366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:12,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1248 Valid, 877 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 3366 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:26:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70928 states. [2022-03-01 18:26:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70928 to 48398. [2022-03-01 18:26:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48398 states, 48397 states have (on average 3.687212017273798) internal successors, (178450), 48397 states have internal predecessors, (178450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48398 states to 48398 states and 178450 transitions. [2022-03-01 18:26:13,718 INFO L78 Accepts]: Start accepts. Automaton has 48398 states and 178450 transitions. Word has length 35 [2022-03-01 18:26:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:13,718 INFO L470 AbstractCegarLoop]: Abstraction has 48398 states and 178450 transitions. [2022-03-01 18:26:13,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 48398 states and 178450 transitions. [2022-03-01 18:26:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:13,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:13,798 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:13,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:13,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:13,998 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash 101090785, now seen corresponding path program 61 times [2022-03-01 18:26:13,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:13,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450568568] [2022-03-01 18:26:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:13,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:14,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:14,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450568568] [2022-03-01 18:26:14,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450568568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:14,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223916744] [2022-03-01 18:26:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:26:14,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:14,191 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) [2022-03-01 18:26:14,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 18:26:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:26:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:14,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:14,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:14,516 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 14 treesize of output 18 [2022-03-01 18:26:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:14,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223916744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:14,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:14,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 18:26:14,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915494285] [2022-03-01 18:26:14,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:14,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:26:14,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:14,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:26:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:26:14,649 INFO L87 Difference]: Start difference. First operand 48398 states and 178450 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:16,570 INFO L93 Difference]: Finished difference Result 72733 states and 265229 transitions. [2022-03-01 18:26:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:26:16,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:26:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:17,089 INFO L225 Difference]: With dead ends: 72733 [2022-03-01 18:26:17,089 INFO L226 Difference]: Without dead ends: 72733 [2022-03-01 18:26:17,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=895, Invalid=2887, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 18:26:17,089 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 471 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:17,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 443 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:26:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72733 states. [2022-03-01 18:26:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72733 to 48464. [2022-03-01 18:26:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48464 states, 48463 states have (on average 3.686172956688608) internal successors, (178643), 48463 states have internal predecessors, (178643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48464 states to 48464 states and 178643 transitions. [2022-03-01 18:26:18,591 INFO L78 Accepts]: Start accepts. Automaton has 48464 states and 178643 transitions. Word has length 35 [2022-03-01 18:26:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 48464 states and 178643 transitions. [2022-03-01 18:26:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 48464 states and 178643 transitions. [2022-03-01 18:26:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:18,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:18,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:18,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:18,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:18,878 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1708310693, now seen corresponding path program 62 times [2022-03-01 18:26:18,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:18,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020686378] [2022-03-01 18:26:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:18,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:19,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:19,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020686378] [2022-03-01 18:26:19,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020686378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:19,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488329474] [2022-03-01 18:26:19,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:26:19,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:19,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:19,077 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) [2022-03-01 18:26:19,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 18:26:19,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:26:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:26:19,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:26:19,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-01 18:26:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:19,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:19,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:19,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:26:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:19,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488329474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:19,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:19,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:26:19,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274366894] [2022-03-01 18:26:19,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:19,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:26:19,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:19,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:26:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:26:19,546 INFO L87 Difference]: Start difference. First operand 48464 states and 178643 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:21,645 INFO L93 Difference]: Finished difference Result 81337 states and 297983 transitions. [2022-03-01 18:26:21,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:26:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:26:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:22,211 INFO L225 Difference]: With dead ends: 81337 [2022-03-01 18:26:22,211 INFO L226 Difference]: Without dead ends: 81309 [2022-03-01 18:26:22,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=984, Invalid=3438, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:26:22,211 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 582 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:22,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 546 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:26:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81309 states. [2022-03-01 18:26:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81309 to 48501. [2022-03-01 18:26:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48501 states, 48500 states have (on average 3.686226804123711) internal successors, (178782), 48500 states have internal predecessors, (178782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48501 states to 48501 states and 178782 transitions. [2022-03-01 18:26:23,805 INFO L78 Accepts]: Start accepts. Automaton has 48501 states and 178782 transitions. Word has length 35 [2022-03-01 18:26:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:23,805 INFO L470 AbstractCegarLoop]: Abstraction has 48501 states and 178782 transitions. [2022-03-01 18:26:23,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48501 states and 178782 transitions. [2022-03-01 18:26:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:23,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:23,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:23,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-01 18:26:24,101 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,SelfDestructingSolverStorable202 [2022-03-01 18:26:24,101 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1928903629, now seen corresponding path program 63 times [2022-03-01 18:26:24,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:24,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058318586] [2022-03-01 18:26:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:24,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:24,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058318586] [2022-03-01 18:26:24,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058318586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:24,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733734200] [2022-03-01 18:26:24,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:26:24,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:24,292 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) [2022-03-01 18:26:24,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 18:26:24,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:26:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:26:24,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:24,813 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 18:26:24,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-03-01 18:26:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:24,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:24,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:24,925 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-01 18:26:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:25,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733734200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:25,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:25,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-03-01 18:26:25,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993950950] [2022-03-01 18:26:25,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:25,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:26:25,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:26:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:26:25,133 INFO L87 Difference]: Start difference. First operand 48501 states and 178782 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:30,957 INFO L93 Difference]: Finished difference Result 73400 states and 263382 transitions. [2022-03-01 18:26:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-01 18:26:30,957 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:26:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:31,210 INFO L225 Difference]: With dead ends: 73400 [2022-03-01 18:26:31,210 INFO L226 Difference]: Without dead ends: 73364 [2022-03-01 18:26:31,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5652 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3680, Invalid=13876, Unknown=0, NotChecked=0, Total=17556 [2022-03-01 18:26:31,211 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1318 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 3828 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 3828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:31,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1318 Valid, 948 Invalid, 4056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 3828 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:26:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73364 states. [2022-03-01 18:26:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73364 to 48671. [2022-03-01 18:26:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48671 states, 48670 states have (on average 3.686007807684405) internal successors, (179398), 48670 states have internal predecessors, (179398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48671 states to 48671 states and 179398 transitions. [2022-03-01 18:26:32,709 INFO L78 Accepts]: Start accepts. Automaton has 48671 states and 179398 transitions. Word has length 35 [2022-03-01 18:26:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 48671 states and 179398 transitions. [2022-03-01 18:26:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 48671 states and 179398 transitions. [2022-03-01 18:26:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:32,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:32,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:32,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-01 18:26:32,997 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,SelfDestructingSolverStorable203 [2022-03-01 18:26:32,998 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1377771707, now seen corresponding path program 64 times [2022-03-01 18:26:32,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:32,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013161182] [2022-03-01 18:26:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:33,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:33,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013161182] [2022-03-01 18:26:33,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013161182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:33,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389103691] [2022-03-01 18:26:33,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:26:33,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:33,676 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) [2022-03-01 18:26:33,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 18:26:33,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:26:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:26:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:34,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:34,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:34,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:26:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:34,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389103691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:34,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:34,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:26:34,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832684150] [2022-03-01 18:26:34,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:34,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:26:34,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:26:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:26:34,318 INFO L87 Difference]: Start difference. First operand 48671 states and 179398 transitions. Second operand has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:36,807 INFO L93 Difference]: Finished difference Result 73189 states and 266640 transitions. [2022-03-01 18:26:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:26:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:26:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:37,052 INFO L225 Difference]: With dead ends: 73189 [2022-03-01 18:26:37,052 INFO L226 Difference]: Without dead ends: 73189 [2022-03-01 18:26:37,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1456, Invalid=3946, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:26:37,053 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 462 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:37,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 478 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:26:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73189 states. [2022-03-01 18:26:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73189 to 48721. [2022-03-01 18:26:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48721 states, 48720 states have (on average 3.685406403940887) internal successors, (179553), 48720 states have internal predecessors, (179553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48721 states to 48721 states and 179553 transitions. [2022-03-01 18:26:38,756 INFO L78 Accepts]: Start accepts. Automaton has 48721 states and 179553 transitions. Word has length 35 [2022-03-01 18:26:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:38,756 INFO L470 AbstractCegarLoop]: Abstraction has 48721 states and 179553 transitions. [2022-03-01 18:26:38,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 48721 states and 179553 transitions. [2022-03-01 18:26:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:38,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:38,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:38,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-01 18:26:39,109 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,SelfDestructingSolverStorable204 [2022-03-01 18:26:39,109 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 780313845, now seen corresponding path program 65 times [2022-03-01 18:26:39,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:39,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781808965] [2022-03-01 18:26:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:39,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:39,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781808965] [2022-03-01 18:26:39,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781808965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:39,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208916323] [2022-03-01 18:26:39,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:26:39,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:39,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:39,315 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) [2022-03-01 18:26:39,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 18:26:39,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:26:39,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 18:26:39,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:39,543 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 18:26:39,543 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 11 treesize of output 11 [2022-03-01 18:26:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:39,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:39,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:39,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:26:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:39,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208916323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:39,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:39,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-03-01 18:26:39,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698007440] [2022-03-01 18:26:39,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:39,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:26:39,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:26:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:26:39,854 INFO L87 Difference]: Start difference. First operand 48721 states and 179553 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:26:48,499 INFO L93 Difference]: Finished difference Result 80000 states and 286694 transitions. [2022-03-01 18:26:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-03-01 18:26:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:26:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:26:48,779 INFO L225 Difference]: With dead ends: 80000 [2022-03-01 18:26:48,779 INFO L226 Difference]: Without dead ends: 79976 [2022-03-01 18:26:48,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15182 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9366, Invalid=29640, Unknown=0, NotChecked=0, Total=39006 [2022-03-01 18:26:48,780 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1498 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 3552 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:26:48,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1300 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3552 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:26:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79976 states. [2022-03-01 18:26:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79976 to 49355. [2022-03-01 18:26:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49355 states, 49354 states have (on average 3.6807350974591726) internal successors, (181659), 49354 states have internal predecessors, (181659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49355 states to 49355 states and 181659 transitions. [2022-03-01 18:26:50,733 INFO L78 Accepts]: Start accepts. Automaton has 49355 states and 181659 transitions. Word has length 35 [2022-03-01 18:26:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:26:50,733 INFO L470 AbstractCegarLoop]: Abstraction has 49355 states and 181659 transitions. [2022-03-01 18:26:50,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:26:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 49355 states and 181659 transitions. [2022-03-01 18:26:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:26:50,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:26:50,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:26:50,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-01 18:26:51,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:51,035 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:26:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:26:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2067823395, now seen corresponding path program 66 times [2022-03-01 18:26:51,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:26:51,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305091546] [2022-03-01 18:26:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:26:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:26:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:26:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:51,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:26:51,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305091546] [2022-03-01 18:26:51,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305091546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:26:51,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879569595] [2022-03-01 18:26:51,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:26:51,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:26:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:26:51,250 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) [2022-03-01 18:26:51,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 18:26:51,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:26:51,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:26:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:26:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:26:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:51,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:26:51,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:26:51,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:26:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:26:51,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879569595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:26:51,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:26:51,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-03-01 18:26:51,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32982511] [2022-03-01 18:26:51,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:26:51,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:26:51,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:26:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:26:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:26:51,865 INFO L87 Difference]: Start difference. First operand 49355 states and 181659 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:03,335 INFO L93 Difference]: Finished difference Result 90456 states and 332183 transitions. [2022-03-01 18:27:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-03-01 18:27:03,335 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:03,690 INFO L225 Difference]: With dead ends: 90456 [2022-03-01 18:27:03,690 INFO L226 Difference]: Without dead ends: 90429 [2022-03-01 18:27:03,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26478 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11342, Invalid=47464, Unknown=0, NotChecked=0, Total=58806 [2022-03-01 18:27:03,692 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2488 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 5446 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 5850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 5446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:03,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 1529 Invalid, 5850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 5446 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-01 18:27:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90429 states. [2022-03-01 18:27:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90429 to 49361. [2022-03-01 18:27:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49361 states, 49360 states have (on average 3.6822123176661266) internal successors, (181754), 49360 states have internal predecessors, (181754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49361 states to 49361 states and 181754 transitions. [2022-03-01 18:27:05,679 INFO L78 Accepts]: Start accepts. Automaton has 49361 states and 181754 transitions. Word has length 35 [2022-03-01 18:27:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 49361 states and 181754 transitions. [2022-03-01 18:27:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 49361 states and 181754 transitions. [2022-03-01 18:27:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:05,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:05,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:05,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:05,963 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,SelfDestructingSolverStorable206 [2022-03-01 18:27:05,963 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash 832590451, now seen corresponding path program 67 times [2022-03-01 18:27:05,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:05,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945838930] [2022-03-01 18:27:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:05,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:06,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:06,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945838930] [2022-03-01 18:27:06,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945838930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:06,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123383283] [2022-03-01 18:27:06,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:27:06,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:06,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:06,159 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) [2022-03-01 18:27:06,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 18:27:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:06,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:27:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:06,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:06,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:06,482 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 12 treesize of output 16 [2022-03-01 18:27:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:06,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123383283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:06,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:06,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 18:27:06,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916919827] [2022-03-01 18:27:06,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:06,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:27:06,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:27:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:27:06,649 INFO L87 Difference]: Start difference. First operand 49361 states and 181754 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:08,839 INFO L93 Difference]: Finished difference Result 82833 states and 302853 transitions. [2022-03-01 18:27:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:27:08,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:09,154 INFO L225 Difference]: With dead ends: 82833 [2022-03-01 18:27:09,154 INFO L226 Difference]: Without dead ends: 82833 [2022-03-01 18:27:09,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=2844, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 18:27:09,155 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 590 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:09,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 471 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1377 Invalid, 0 Unknown, 237 Unchecked, 0.6s Time] [2022-03-01 18:27:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82833 states. [2022-03-01 18:27:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82833 to 48971. [2022-03-01 18:27:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48971 states, 48970 states have (on average 3.6874617112517867) internal successors, (180575), 48970 states have internal predecessors, (180575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48971 states to 48971 states and 180575 transitions. [2022-03-01 18:27:10,720 INFO L78 Accepts]: Start accepts. Automaton has 48971 states and 180575 transitions. Word has length 35 [2022-03-01 18:27:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:10,720 INFO L470 AbstractCegarLoop]: Abstraction has 48971 states and 180575 transitions. [2022-03-01 18:27:10,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 48971 states and 180575 transitions. [2022-03-01 18:27:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:10,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:10,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:10,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-01 18:27:11,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:11,005 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash 433797259, now seen corresponding path program 68 times [2022-03-01 18:27:11,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:11,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095991857] [2022-03-01 18:27:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:11,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:11,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:11,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095991857] [2022-03-01 18:27:11,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095991857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:11,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498820974] [2022-03-01 18:27:11,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:27:11,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:11,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:11,189 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) [2022-03-01 18:27:11,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 18:27:11,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:27:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:11,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:11,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:11,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:11,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 18:27:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:11,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498820974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:11,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:11,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 18:27:11,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565358595] [2022-03-01 18:27:11,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:11,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:27:11,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:27:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:27:11,903 INFO L87 Difference]: Start difference. First operand 48971 states and 180575 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:13,952 INFO L93 Difference]: Finished difference Result 72722 states and 265932 transitions. [2022-03-01 18:27:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:27:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:14,184 INFO L225 Difference]: With dead ends: 72722 [2022-03-01 18:27:14,184 INFO L226 Difference]: Without dead ends: 72714 [2022-03-01 18:27:14,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1156, Invalid=3134, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:27:14,185 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 513 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:14,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 509 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:27:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72714 states. [2022-03-01 18:27:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72714 to 48891. [2022-03-01 18:27:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48891 states, 48890 states have (on average 3.688668439353651) internal successors, (180339), 48890 states have internal predecessors, (180339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48891 states to 48891 states and 180339 transitions. [2022-03-01 18:27:15,609 INFO L78 Accepts]: Start accepts. Automaton has 48891 states and 180339 transitions. Word has length 35 [2022-03-01 18:27:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:15,609 INFO L470 AbstractCegarLoop]: Abstraction has 48891 states and 180339 transitions. [2022-03-01 18:27:15,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 48891 states and 180339 transitions. [2022-03-01 18:27:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:15,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:15,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:16,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:16,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:16,171 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash 346909209, now seen corresponding path program 69 times [2022-03-01 18:27:16,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:16,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666363871] [2022-03-01 18:27:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:16,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:16,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666363871] [2022-03-01 18:27:16,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666363871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:16,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97514457] [2022-03-01 18:27:16,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:27:16,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:16,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:16,372 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) [2022-03-01 18:27:16,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 18:27:16,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:27:16,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:27:16,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:16,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:16,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:16,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 18:27:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:16,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97514457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:16,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:16,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:27:16,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329062295] [2022-03-01 18:27:16,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:16,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:27:16,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:16,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:27:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:27:16,816 INFO L87 Difference]: Start difference. First operand 48891 states and 180339 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:18,689 INFO L93 Difference]: Finished difference Result 82213 states and 300935 transitions. [2022-03-01 18:27:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:27:18,689 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:18,974 INFO L225 Difference]: With dead ends: 82213 [2022-03-01 18:27:18,975 INFO L226 Difference]: Without dead ends: 82167 [2022-03-01 18:27:18,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=883, Invalid=3149, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:27:18,975 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 640 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:18,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 518 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:27:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82167 states. [2022-03-01 18:27:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82167 to 48891. [2022-03-01 18:27:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48891 states, 48890 states have (on average 3.688668439353651) internal successors, (180339), 48890 states have internal predecessors, (180339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48891 states to 48891 states and 180339 transitions. [2022-03-01 18:27:20,771 INFO L78 Accepts]: Start accepts. Automaton has 48891 states and 180339 transitions. Word has length 35 [2022-03-01 18:27:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:20,771 INFO L470 AbstractCegarLoop]: Abstraction has 48891 states and 180339 transitions. [2022-03-01 18:27:20,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 48891 states and 180339 transitions. [2022-03-01 18:27:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:20,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:20,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:20,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:21,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-03-01 18:27:21,111 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:21,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:21,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1441938921, now seen corresponding path program 70 times [2022-03-01 18:27:21,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:21,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853460030] [2022-03-01 18:27:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:21,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:21,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853460030] [2022-03-01 18:27:21,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853460030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:21,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477125587] [2022-03-01 18:27:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:27:21,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:21,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:21,303 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) [2022-03-01 18:27:21,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 18:27:21,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:27:21,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:27:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:21,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:21,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:21,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:27:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:21,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477125587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:21,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:21,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 18:27:21,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481407984] [2022-03-01 18:27:21,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:21,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:27:21,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:27:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:27:21,787 INFO L87 Difference]: Start difference. First operand 48891 states and 180339 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:24,277 INFO L93 Difference]: Finished difference Result 94201 states and 346405 transitions. [2022-03-01 18:27:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:27:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:24,873 INFO L225 Difference]: With dead ends: 94201 [2022-03-01 18:27:24,873 INFO L226 Difference]: Without dead ends: 94201 [2022-03-01 18:27:24,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1432, Invalid=4730, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:27:24,873 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 711 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:24,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 407 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:27:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94201 states. [2022-03-01 18:27:26,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94201 to 49103. [2022-03-01 18:27:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49103 states, 49102 states have (on average 3.685776546780172) internal successors, (180979), 49102 states have internal predecessors, (180979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49103 states to 49103 states and 180979 transitions. [2022-03-01 18:27:26,503 INFO L78 Accepts]: Start accepts. Automaton has 49103 states and 180979 transitions. Word has length 35 [2022-03-01 18:27:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:26,503 INFO L470 AbstractCegarLoop]: Abstraction has 49103 states and 180979 transitions. [2022-03-01 18:27:26,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 49103 states and 180979 transitions. [2022-03-01 18:27:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:26,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:26,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:26,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:26,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:26,787 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash -981173691, now seen corresponding path program 71 times [2022-03-01 18:27:26,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:26,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726758770] [2022-03-01 18:27:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:26,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:26,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726758770] [2022-03-01 18:27:26,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726758770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:26,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980748325] [2022-03-01 18:27:26,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:27:26,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:26,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:26,989 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) [2022-03-01 18:27:26,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 18:27:27,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:27:27,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:27:27,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:27,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:27,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:27,625 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 13 treesize of output 17 [2022-03-01 18:27:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:27,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980748325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:27,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:27,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:27:27,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466105844] [2022-03-01 18:27:27,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:27,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:27:27,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:27:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:27:27,773 INFO L87 Difference]: Start difference. First operand 49103 states and 180979 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:30,513 INFO L93 Difference]: Finished difference Result 88502 states and 325078 transitions. [2022-03-01 18:27:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:27:30,514 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:30,828 INFO L225 Difference]: With dead ends: 88502 [2022-03-01 18:27:30,828 INFO L226 Difference]: Without dead ends: 88482 [2022-03-01 18:27:30,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1600, Invalid=5042, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:27:30,829 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 744 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:30,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 575 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1598 Invalid, 0 Unknown, 618 Unchecked, 0.7s Time] [2022-03-01 18:27:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88482 states. [2022-03-01 18:27:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88482 to 49781. [2022-03-01 18:27:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49781 states, 49780 states have (on average 3.6796705504218563) internal successors, (183174), 49780 states have internal predecessors, (183174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49781 states to 49781 states and 183174 transitions. [2022-03-01 18:27:32,770 INFO L78 Accepts]: Start accepts. Automaton has 49781 states and 183174 transitions. Word has length 35 [2022-03-01 18:27:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:32,770 INFO L470 AbstractCegarLoop]: Abstraction has 49781 states and 183174 transitions. [2022-03-01 18:27:32,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 49781 states and 183174 transitions. [2022-03-01 18:27:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:32,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:32,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:32,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-01 18:27:33,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-01 18:27:33,059 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:33,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1673921655, now seen corresponding path program 72 times [2022-03-01 18:27:33,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:33,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869106766] [2022-03-01 18:27:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:33,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:33,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869106766] [2022-03-01 18:27:33,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869106766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:33,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543233517] [2022-03-01 18:27:33,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:27:33,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:33,294 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) [2022-03-01 18:27:33,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 18:27:33,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:27:33,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:27:33,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:33,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:33,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:33,605 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 12 treesize of output 16 [2022-03-01 18:27:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:33,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543233517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:33,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:33,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-01 18:27:33,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282039867] [2022-03-01 18:27:33,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:27:33,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:27:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:27:33,761 INFO L87 Difference]: Start difference. First operand 49781 states and 183174 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:36,704 INFO L93 Difference]: Finished difference Result 89561 states and 327953 transitions. [2022-03-01 18:27:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:27:36,705 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:37,021 INFO L225 Difference]: With dead ends: 89561 [2022-03-01 18:27:37,021 INFO L226 Difference]: Without dead ends: 89561 [2022-03-01 18:27:37,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1621, Invalid=4859, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:27:37,022 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 664 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:37,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 455 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:27:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89561 states. [2022-03-01 18:27:38,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89561 to 49773. [2022-03-01 18:27:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49773 states, 49772 states have (on average 3.678493932331431) internal successors, (183086), 49772 states have internal predecessors, (183086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49773 states to 49773 states and 183086 transitions. [2022-03-01 18:27:39,041 INFO L78 Accepts]: Start accepts. Automaton has 49773 states and 183086 transitions. Word has length 35 [2022-03-01 18:27:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:39,042 INFO L470 AbstractCegarLoop]: Abstraction has 49773 states and 183086 transitions. [2022-03-01 18:27:39,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 49773 states and 183086 transitions. [2022-03-01 18:27:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:39,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:39,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:39,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:39,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-01 18:27:39,388 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash 483143211, now seen corresponding path program 73 times [2022-03-01 18:27:39,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:39,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744018932] [2022-03-01 18:27:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:39,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:39,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:39,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744018932] [2022-03-01 18:27:39,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744018932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:39,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852837574] [2022-03-01 18:27:39,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:27:39,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:39,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:39,634 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) [2022-03-01 18:27:39,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 18:27:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 18:27:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:39,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:40,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:40,009 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 11 treesize of output 15 [2022-03-01 18:27:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:27:40,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852837574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:40,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:40,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2022-03-01 18:27:40,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318159285] [2022-03-01 18:27:40,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:40,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:27:40,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:27:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:27:40,164 INFO L87 Difference]: Start difference. First operand 49773 states and 183086 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:42,931 INFO L93 Difference]: Finished difference Result 88108 states and 323830 transitions. [2022-03-01 18:27:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:27:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 18:27:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:43,294 INFO L225 Difference]: With dead ends: 88108 [2022-03-01 18:27:43,295 INFO L226 Difference]: Without dead ends: 88100 [2022-03-01 18:27:43,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1315, Invalid=3941, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:27:43,295 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 569 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:43,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 526 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1566 Invalid, 0 Unknown, 295 Unchecked, 0.9s Time] [2022-03-01 18:27:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88100 states. [2022-03-01 18:27:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88100 to 49937. [2022-03-01 18:27:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49937 states, 49936 states have (on average 3.6769464915091317) internal successors, (183612), 49936 states have internal predecessors, (183612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49937 states to 49937 states and 183612 transitions. [2022-03-01 18:27:45,037 INFO L78 Accepts]: Start accepts. Automaton has 49937 states and 183612 transitions. Word has length 35 [2022-03-01 18:27:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:45,037 INFO L470 AbstractCegarLoop]: Abstraction has 49937 states and 183612 transitions. [2022-03-01 18:27:45,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 49937 states and 183612 transitions. [2022-03-01 18:27:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 18:27:45,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:45,400 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:45,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:45,622 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,SelfDestructingSolverStorable213 [2022-03-01 18:27:45,623 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:27:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 45041473, now seen corresponding path program 74 times [2022-03-01 18:27:45,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:45,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711010918] [2022-03-01 18:27:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:45,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:45,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711010918] [2022-03-01 18:27:45,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711010918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:45,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818471041] [2022-03-01 18:27:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:27:45,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:45,828 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) [2022-03-01 18:27:45,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 18:27:45,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:27:45,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:46,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:46,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:27:46,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 18:27:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:46,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818471041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:46,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:46,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-03-01 18:27:46,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151429549] [2022-03-01 18:27:46,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:46,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:27:46,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:27:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:27:46,337 INFO L87 Difference]: Start difference. First operand 49937 states and 183612 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-01 18:27:46,408 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 [2022-03-01 18:27:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:27:46,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:46,411 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:46,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 7 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:27:46,412 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:27:46,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:46,430 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:27:46,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:46,613 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (49937states) and FLOYD_HOARE automaton (currently 6 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (8 states constructed, input type IntersectNwa). [2022-03-01 18:27:46,615 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:27:46,615 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:27:46,615 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:27:46,618 INFO L732 BasicCegarLoop]: Path program histogram: [74, 71, 64, 2, 1, 1, 1, 1] [2022-03-01 18:27:46,619 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:27:46,620 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:27:46,623 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:27:46 BasicIcfg [2022-03-01 18:27:46,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:27:46,624 INFO L158 Benchmark]: Toolchain (without parser) took 691026.09ms. Allocated memory was 208.7MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 169.0MB in the beginning and 6.6GB in the end (delta: -6.4GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-03-01 18:27:46,624 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.18ms. Allocated memory is still 208.7MB. Free memory is still 170.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:27:46,624 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.92ms. Allocated memory is still 208.7MB. Free memory was 169.0MB in the beginning and 167.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:27:46,624 INFO L158 Benchmark]: Boogie Preprocessor took 24.68ms. Allocated memory is still 208.7MB. Free memory was 167.5MB in the beginning and 166.5MB in the end (delta: 973.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:27:46,624 INFO L158 Benchmark]: RCFGBuilder took 269.23ms. Allocated memory is still 208.7MB. Free memory was 166.4MB in the beginning and 157.0MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:27:46,624 INFO L158 Benchmark]: TraceAbstraction took 690702.63ms. Allocated memory was 208.7MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 156.5MB in the beginning and 6.6GB in the end (delta: -6.4GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-03-01 18:27:46,624 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 0.18ms. Allocated memory is still 208.7MB. Free memory is still 170.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.92ms. Allocated memory is still 208.7MB. Free memory was 169.0MB in the beginning and 167.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.68ms. Allocated memory is still 208.7MB. Free memory was 167.5MB in the beginning and 166.5MB in the end (delta: 973.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 269.23ms. Allocated memory is still 208.7MB. Free memory was 166.4MB in the beginning and 157.0MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 690702.63ms. Allocated memory was 208.7MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 156.5MB in the beginning and 6.6GB in the end (delta: -6.4GB). Peak memory consumption was 1.4GB. 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: 75]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (49937states) and FLOYD_HOARE automaton (currently 6 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (8 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (49937states) and FLOYD_HOARE automaton (currently 6 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (8 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (49937states) and FLOYD_HOARE automaton (currently 6 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (8 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (49937states) and FLOYD_HOARE automaton (currently 6 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (8 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 66 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 690.5s, OverallIterations: 215, TraceHistogramMax: 2, PathProgramHistogramMax: 74, EmptinessCheckTime: 8.4s, AutomataDifference: 395.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 123982 SdHoareTripleChecker+Valid, 116.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 123982 mSDsluCounter, 94919 SdHoareTripleChecker+Invalid, 96.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 24210 IncrementalHoareTripleChecker+Unchecked, 109004 mSDsCounter, 14434 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 241241 IncrementalHoareTripleChecker+Invalid, 279885 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14434 mSolverCounterUnsat, 9726 mSDtfsCounter, 241241 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20935 GetRequests, 8897 SyntacticMatches, 421 SemanticMatches, 11617 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 343212 ImplicationChecksByTransitivity, 229.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49937occurred in iteration=214, InterpolantAutomatonStates: 8888, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 136.5s AutomataMinimizationTime, 214 MinimizatonAttempts, 2853702 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 107.6s InterpolantComputationTime, 12256 NumberOfCodeBlocks, 12218 NumberOfCodeBlocksAsserted, 612 NumberOfCheckSat, 17187 ConstructedInterpolants, 194 QuantifiedInterpolants, 145876 SizeOfPredicates, 1789 NumberOfNonLiveVariables, 11618 ConjunctsInSsa, 2106 ConjunctsInUnsatCore, 558 InterpolantComputations, 46 PerfectInterpolantSequences, 1936/3149 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