/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/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:36:57,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:36:57,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:36:57,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:36:57,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:36:57,795 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:36:57,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:36:57,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:36:57,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:36:57,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:36:57,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:36:57,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:36:57,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:36:57,796 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:36:57,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:36:57,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:36:57,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:36:57,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:36:57,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:36:57,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:36:57,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:36:58,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:36:58,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:36:58,003 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:36:58,003 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:36:58,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2022-03-15 16:36:58,005 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2022-03-15 16:36:58,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:36:58,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:36:58,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:36:58,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:36:58,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:36:58,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,048 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:36:58,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:36:58,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:36:58,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:36:58,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:36:58,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:36:58,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:36:58,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:36:58,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:36:58,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/1) ... [2022-03-15 16:36:58,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:36:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:58,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:36:58,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:36:58,118 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:36:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:36:58,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:36:58,119 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:36:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:36:58,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:36:58,119 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:36:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:36:58,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:36:58,120 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:36:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:36:58,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:36:58,121 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:36:58,154 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:36:58,156 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:36:58,226 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:36:58,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:36:58,231 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:36:58,232 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:36:58 BoogieIcfgContainer [2022-03-15 16:36:58,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:36:58,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:36:58,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:36:58,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:36:58,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:36:58" (1/2) ... [2022-03-15 16:36:58,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db72e52 and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:36:58, skipping insertion in model container [2022-03-15 16:36:58,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:36:58" (2/2) ... [2022-03-15 16:36:58,238 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2022-03-15 16:36:58,241 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:36:58,242 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:36:58,242 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:36:58,242 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:36:58,268 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:36:58,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:36:58,302 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:36:58,303 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:36:58,310 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-03-15 16:36:58,359 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:36:58,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:58,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:58,372 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash 855514725, now seen corresponding path program 1 times [2022-03-15 16:36:58,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:58,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051841878] [2022-03-15 16:36:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:58,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:58,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051841878] [2022-03-15 16:36:58,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051841878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:36:58,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:36:58,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:36:58,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551582040] [2022-03-15 16:36:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:36:58,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:36:58,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:58,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:36:58,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:36:58,540 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 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) [2022-03-15 16:36:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:58,584 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-03-15 16:36:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:36:58,586 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 [2022-03-15 16:36:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:58,595 INFO L225 Difference]: With dead ends: 298 [2022-03-15 16:36:58,596 INFO L226 Difference]: Without dead ends: 283 [2022-03-15 16:36:58,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:36:58,602 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 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 [2022-03-15 16:36:58,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:36:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-15 16:36:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-03-15 16:36:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-03-15 16:36:58,684 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-03-15 16:36:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-03-15 16:36:58,685 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) [2022-03-15 16:36:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-03-15 16:36:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:36:58,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:58,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:36:58,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:36:58,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:58,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:58,688 INFO L85 PathProgramCache]: Analyzing trace with hash -116344776, now seen corresponding path program 1 times [2022-03-15 16:36:58,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:58,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124697865] [2022-03-15 16:36:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:58,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:58,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:58,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124697865] [2022-03-15 16:36:58,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124697865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:58,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103962448] [2022-03-15 16:36:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:58,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:58,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:58,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:36:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:36:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:36:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:59,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:36:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:59,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103962448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:36:59,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:36:59,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 16:36:59,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043834923] [2022-03-15 16:36:59,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:36:59,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:36:59,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:36:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:36:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:36:59,147 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:36:59,661 INFO L93 Difference]: Finished difference Result 1259 states and 3629 transitions. [2022-03-15 16:36:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:36:59,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:36:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:36:59,670 INFO L225 Difference]: With dead ends: 1259 [2022-03-15 16:36:59,670 INFO L226 Difference]: Without dead ends: 1259 [2022-03-15 16:36:59,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:36:59,673 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 367 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:36:59,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 88 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:36:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-15 16:36:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 253. [2022-03-15 16:36:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2022-03-15 16:36:59,710 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2022-03-15 16:36:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:36:59,710 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2022-03-15 16:36:59,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:36:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2022-03-15 16:36:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:36:59,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:36:59,716 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] [2022-03-15 16:36:59,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:36:59,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:59,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:36:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:36:59,933 INFO L85 PathProgramCache]: Analyzing trace with hash -310245444, now seen corresponding path program 2 times [2022-03-15 16:36:59,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:36:59,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363799367] [2022-03-15 16:36:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:36:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:36:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:36:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:36:59,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:36:59,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363799367] [2022-03-15 16:36:59,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363799367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:36:59,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842124463] [2022-03-15 16:36:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:36:59,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:36:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:36:59,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:36:59,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:37:00,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:00,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:37:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842124463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:00,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:00,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 16:37:00,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371951985] [2022-03-15 16:37:00,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:00,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:37:00,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:37:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:00,177 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:00,509 INFO L93 Difference]: Finished difference Result 1133 states and 3241 transitions. [2022-03-15 16:37:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:37:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:00,515 INFO L225 Difference]: With dead ends: 1133 [2022-03-15 16:37:00,515 INFO L226 Difference]: Without dead ends: 1133 [2022-03-15 16:37:00,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:37:00,516 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:00,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 95 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-15 16:37:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 252. [2022-03-15 16:37:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2022-03-15 16:37:00,554 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2022-03-15 16:37:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:00,554 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2022-03-15 16:37:00,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2022-03-15 16:37:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:00,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:00,555 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] [2022-03-15 16:37:00,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:00,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-15 16:37:00,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1009084743, now seen corresponding path program 1 times [2022-03-15 16:37:00,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:00,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914943926] [2022-03-15 16:37:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:00,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:00,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914943926] [2022-03-15 16:37:00,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914943926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:37:00,806 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:37:00,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:37:00,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599474981] [2022-03-15 16:37:00,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:00,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:37:00,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:37:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:37:00,807 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:00,858 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2022-03-15 16:37:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:37:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:00,860 INFO L225 Difference]: With dead ends: 483 [2022-03-15 16:37:00,860 INFO L226 Difference]: Without dead ends: 477 [2022-03-15 16:37:00,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:37:00,861 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:00,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 28 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:37:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-15 16:37:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2022-03-15 16:37:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2022-03-15 16:37:00,885 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2022-03-15 16:37:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:00,885 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2022-03-15 16:37:00,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2022-03-15 16:37:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:00,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:00,886 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] [2022-03-15 16:37:00,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:37:00,886 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1724408590, now seen corresponding path program 1 times [2022-03-15 16:37:00,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:00,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815404548] [2022-03-15 16:37:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:00,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:00,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815404548] [2022-03-15 16:37:00,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815404548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:37:00,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:37:00,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:37:00,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894313624] [2022-03-15 16:37:00,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:00,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:37:00,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:37:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:37:00,918 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:00,979 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2022-03-15 16:37:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:37:00,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:00,981 INFO L225 Difference]: With dead ends: 539 [2022-03-15 16:37:00,981 INFO L226 Difference]: Without dead ends: 521 [2022-03-15 16:37:00,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:37:00,982 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:00,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 45 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:37:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-15 16:37:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2022-03-15 16:37:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2022-03-15 16:37:00,991 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2022-03-15 16:37:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:00,992 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2022-03-15 16:37:00,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2022-03-15 16:37:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:00,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:00,993 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] [2022-03-15 16:37:00,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:37:00,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1927279607, now seen corresponding path program 2 times [2022-03-15 16:37:00,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:00,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952450541] [2022-03-15 16:37:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:01,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952450541] [2022-03-15 16:37:01,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952450541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:37:01,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:37:01,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:37:01,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025279712] [2022-03-15 16:37:01,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:01,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:37:01,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:37:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:37:01,022 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:01,060 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2022-03-15 16:37:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:37:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:01,063 INFO L225 Difference]: With dead ends: 486 [2022-03-15 16:37:01,063 INFO L226 Difference]: Without dead ends: 486 [2022-03-15 16:37:01,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:37:01,063 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:01,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 35 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:37:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-03-15 16:37:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2022-03-15 16:37:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2022-03-15 16:37:01,073 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2022-03-15 16:37:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:01,073 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2022-03-15 16:37:01,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2022-03-15 16:37:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:01,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:01,074 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] [2022-03-15 16:37:01,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 16:37:01,074 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:01,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1202883661, now seen corresponding path program 3 times [2022-03-15 16:37:01,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:01,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830518684] [2022-03-15 16:37:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:01,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:01,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830518684] [2022-03-15 16:37:01,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830518684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:37:01,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:37:01,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 16:37:01,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478060202] [2022-03-15 16:37:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:01,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:37:01,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:37:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:37:01,107 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:01,160 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2022-03-15 16:37:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:37:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:01,163 INFO L225 Difference]: With dead ends: 438 [2022-03-15 16:37:01,163 INFO L226 Difference]: Without dead ends: 438 [2022-03-15 16:37:01,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:37:01,163 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:01,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:37:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-15 16:37:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2022-03-15 16:37:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-03-15 16:37:01,171 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-03-15 16:37:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:01,171 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-03-15 16:37:01,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-03-15 16:37:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:01,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:01,172 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] [2022-03-15 16:37:01,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 16:37:01,172 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700470, now seen corresponding path program 3 times [2022-03-15 16:37:01,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:01,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184782767] [2022-03-15 16:37:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:01,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184782767] [2022-03-15 16:37:01,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184782767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:01,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766299506] [2022-03-15 16:37:01,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:01,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:01,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:01,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:37:01,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:37:01,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:01,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:37:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766299506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:01,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:01,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-15 16:37:01,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203230820] [2022-03-15 16:37:01,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:01,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:37:01,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:01,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:37:01,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:37:01,340 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:01,630 INFO L93 Difference]: Finished difference Result 1154 states and 3249 transitions. [2022-03-15 16:37:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:37:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:01,635 INFO L225 Difference]: With dead ends: 1154 [2022-03-15 16:37:01,635 INFO L226 Difference]: Without dead ends: 1154 [2022-03-15 16:37:01,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:37:01,636 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:01,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 89 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-15 16:37:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 323. [2022-03-15 16:37:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-03-15 16:37:01,647 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-03-15 16:37:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:01,648 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-03-15 16:37:01,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-03-15 16:37:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:01,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:01,649 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] [2022-03-15 16:37:01,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:01,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:01,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -731586770, now seen corresponding path program 2 times [2022-03-15 16:37:01,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:01,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419833292] [2022-03-15 16:37:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:01,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:01,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419833292] [2022-03-15 16:37:01,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419833292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:37:01,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:37:01,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 16:37:01,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426246917] [2022-03-15 16:37:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:01,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:37:01,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:37:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:37:01,905 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:02,042 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2022-03-15 16:37:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:37:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:02,045 INFO L225 Difference]: With dead ends: 466 [2022-03-15 16:37:02,045 INFO L226 Difference]: Without dead ends: 466 [2022-03-15 16:37:02,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:02,046 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:02,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 48 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-15 16:37:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2022-03-15 16:37:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2022-03-15 16:37:02,054 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2022-03-15 16:37:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:02,054 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2022-03-15 16:37:02,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2022-03-15 16:37:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:02,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:02,055 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] [2022-03-15 16:37:02,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 16:37:02,056 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1391482172, now seen corresponding path program 4 times [2022-03-15 16:37:02,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:02,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173470275] [2022-03-15 16:37:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:02,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:02,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173470275] [2022-03-15 16:37:02,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173470275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:37:02,104 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:37:02,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 16:37:02,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327312712] [2022-03-15 16:37:02,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:02,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:37:02,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:37:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:37:02,105 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:02,202 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2022-03-15 16:37:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:37:02,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:02,204 INFO L225 Difference]: With dead ends: 541 [2022-03-15 16:37:02,204 INFO L226 Difference]: Without dead ends: 537 [2022-03-15 16:37:02,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:37:02,205 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:02,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 79 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-15 16:37:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2022-03-15 16:37:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2022-03-15 16:37:02,213 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2022-03-15 16:37:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:02,213 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2022-03-15 16:37:02,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2022-03-15 16:37:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:02,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:02,215 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] [2022-03-15 16:37:02,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-15 16:37:02,215 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1513963908, now seen corresponding path program 5 times [2022-03-15 16:37:02,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:02,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654362864] [2022-03-15 16:37:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:02,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:02,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654362864] [2022-03-15 16:37:02,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654362864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:02,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699292907] [2022-03-15 16:37:02,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:02,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:02,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:02,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:37:02,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:37:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:02,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:02,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699292907] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:02,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:37:02,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2022-03-15 16:37:02,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902878121] [2022-03-15 16:37:02,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:02,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:37:02,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:02,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:37:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:02,417 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:02,537 INFO L93 Difference]: Finished difference Result 653 states and 1834 transitions. [2022-03-15 16:37:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:37:02,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:02,540 INFO L225 Difference]: With dead ends: 653 [2022-03-15 16:37:02,540 INFO L226 Difference]: Without dead ends: 653 [2022-03-15 16:37:02,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:37:02,541 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:02,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 63 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-15 16:37:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 278. [2022-03-15 16:37:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2022-03-15 16:37:02,549 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2022-03-15 16:37:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:02,549 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2022-03-15 16:37:02,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2022-03-15 16:37:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:37:02,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:02,550 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] [2022-03-15 16:37:02,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:02,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:02,767 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash 268685562, now seen corresponding path program 6 times [2022-03-15 16:37:02,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:02,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302376438] [2022-03-15 16:37:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:02,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:02,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:02,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302376438] [2022-03-15 16:37:02,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302376438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:37:02,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:37:02,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 16:37:02,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199102992] [2022-03-15 16:37:02,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:37:02,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:37:02,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:37:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:37:02,814 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:02,883 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-03-15 16:37:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:37:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:37:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:02,885 INFO L225 Difference]: With dead ends: 429 [2022-03-15 16:37:02,885 INFO L226 Difference]: Without dead ends: 425 [2022-03-15 16:37:02,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:37:02,886 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:02,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-15 16:37:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2022-03-15 16:37:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2022-03-15 16:37:02,892 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2022-03-15 16:37:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:02,892 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2022-03-15 16:37:02,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2022-03-15 16:37:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:02,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:02,893 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] [2022-03-15 16:37:02,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-15 16:37:02,893 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:02,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1300936698, now seen corresponding path program 1 times [2022-03-15 16:37:02,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:02,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963342975] [2022-03-15 16:37:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:02,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:02,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963342975] [2022-03-15 16:37:02,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963342975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:02,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395668430] [2022-03-15 16:37:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:02,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:02,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:02,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:37:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:37:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:03,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-15 16:37:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:03,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:03,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:03,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 17 [2022-03-15 16:37:03,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:37:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:03,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395668430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:03,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:03,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-15 16:37:03,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251425344] [2022-03-15 16:37:03,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:03,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:37:03,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:37:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:37:03,219 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:03,304 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2022-03-15 16:37:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:37:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:37:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:03,306 INFO L225 Difference]: With dead ends: 552 [2022-03-15 16:37:03,306 INFO L226 Difference]: Without dead ends: 537 [2022-03-15 16:37:03,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:37:03,307 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:03,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 68 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-15 16:37:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2022-03-15 16:37:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2022-03-15 16:37:03,314 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2022-03-15 16:37:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:03,315 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2022-03-15 16:37:03,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2022-03-15 16:37:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:03,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:03,316 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] [2022-03-15 16:37:03,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:03,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:37:03,531 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1432556635, now seen corresponding path program 1 times [2022-03-15 16:37:03,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:03,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560756859] [2022-03-15 16:37:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:03,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:03,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560756859] [2022-03-15 16:37:03,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560756859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:03,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112141337] [2022-03-15 16:37:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:03,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:03,710 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:03,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:37:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:03,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:03,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:37:03,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 16:37:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:03,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:04,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:04,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-15 16:37:04,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:37:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:04,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112141337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:04,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:04,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-03-15 16:37:04,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810723776] [2022-03-15 16:37:04,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:04,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:37:04,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:04,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:37:04,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:37:04,172 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:05,025 INFO L93 Difference]: Finished difference Result 850 states and 2460 transitions. [2022-03-15 16:37:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:37:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 24 [2022-03-15 16:37:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:05,029 INFO L225 Difference]: With dead ends: 850 [2022-03-15 16:37:05,029 INFO L226 Difference]: Without dead ends: 835 [2022-03-15 16:37:05,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:37:05,030 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:05,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 180 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-15 16:37:05,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 438. [2022-03-15 16:37:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2022-03-15 16:37:05,040 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2022-03-15 16:37:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:05,041 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2022-03-15 16:37:05,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2022-03-15 16:37:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:05,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:05,042 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] [2022-03-15 16:37:05,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:05,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:05,258 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1637705597, now seen corresponding path program 2 times [2022-03-15 16:37:05,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:05,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013563596] [2022-03-15 16:37:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:05,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:05,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:05,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013563596] [2022-03-15 16:37:05,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013563596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:05,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018804780] [2022-03-15 16:37:05,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:05,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:05,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:05,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:05,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:37:05,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:05,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:05,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:05,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 36 [2022-03-15 16:37:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:05,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:05,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:05,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 17 [2022-03-15 16:37:05,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:37:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:05,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018804780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:05,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:05,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-03-15 16:37:05,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457080763] [2022-03-15 16:37:05,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:05,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:37:05,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:05,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:37:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:37:05,877 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:07,139 INFO L93 Difference]: Finished difference Result 1170 states and 3382 transitions. [2022-03-15 16:37:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:37:07,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:37:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:07,144 INFO L225 Difference]: With dead ends: 1170 [2022-03-15 16:37:07,144 INFO L226 Difference]: Without dead ends: 1155 [2022-03-15 16:37:07,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:37:07,146 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 270 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:07,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 222 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-03-15 16:37:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 439. [2022-03-15 16:37:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2022-03-15 16:37:07,157 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2022-03-15 16:37:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:07,158 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2022-03-15 16:37:07,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2022-03-15 16:37:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:07,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:07,159 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] [2022-03-15 16:37:07,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:07,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:07,377 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:07,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash 142032238, now seen corresponding path program 2 times [2022-03-15 16:37:07,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:07,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678511052] [2022-03-15 16:37:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:07,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:07,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:07,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678511052] [2022-03-15 16:37:07,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678511052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:07,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911502838] [2022-03-15 16:37:07,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:07,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:07,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:07,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:07,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:37:07,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:37:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:07,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 16:37:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:07,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:07,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:07,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-15 16:37:07,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-15 16:37:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:07,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911502838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:07,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:07,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-15 16:37:07,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062350647] [2022-03-15 16:37:07,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:07,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:37:07,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:37:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:37:07,677 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:07,762 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2022-03-15 16:37:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:37:07,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 24 [2022-03-15 16:37:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:07,765 INFO L225 Difference]: With dead ends: 645 [2022-03-15 16:37:07,765 INFO L226 Difference]: Without dead ends: 630 [2022-03-15 16:37:07,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:37:07,766 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:07,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-15 16:37:07,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2022-03-15 16:37:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2022-03-15 16:37:07,776 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2022-03-15 16:37:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:07,777 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2022-03-15 16:37:07,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2022-03-15 16:37:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:07,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:07,778 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] [2022-03-15 16:37:07,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:07,978 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,SelfDestructingSolverStorable15 [2022-03-15 16:37:07,978 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1337506361, now seen corresponding path program 3 times [2022-03-15 16:37:07,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:07,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942708704] [2022-03-15 16:37:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:07,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:08,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:08,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942708704] [2022-03-15 16:37:08,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942708704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:08,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816897381] [2022-03-15 16:37:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:08,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:08,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:08,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:37:08,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:37:08,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:08,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:08,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:08,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-15 16:37:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:08,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:08,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:08,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 17 [2022-03-15 16:37:08,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:37:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:08,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816897381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:08,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:08,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-03-15 16:37:08,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084093520] [2022-03-15 16:37:08,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:08,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:37:08,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:37:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:37:08,522 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:08,804 INFO L93 Difference]: Finished difference Result 679 states and 1940 transitions. [2022-03-15 16:37:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:37:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 [2022-03-15 16:37:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:08,807 INFO L225 Difference]: With dead ends: 679 [2022-03-15 16:37:08,807 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 16:37:08,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:37:08,807 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:08,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 139 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:08,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 16:37:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 465. [2022-03-15 16:37:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2022-03-15 16:37:08,815 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2022-03-15 16:37:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:08,815 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2022-03-15 16:37:08,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2022-03-15 16:37:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:08,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:08,816 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] [2022-03-15 16:37:08,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:09,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:37:09,033 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:09,033 INFO L85 PathProgramCache]: Analyzing trace with hash 857029177, now seen corresponding path program 4 times [2022-03-15 16:37:09,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:09,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097743538] [2022-03-15 16:37:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:09,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:09,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:09,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097743538] [2022-03-15 16:37:09,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097743538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:09,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004598014] [2022-03-15 16:37:09,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:09,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:09,148 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:37:09,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:09,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:09,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-15 16:37:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:09,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:09,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:09,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-15 16:37:09,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:37:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:09,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004598014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:09,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:09,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-15 16:37:09,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428271727] [2022-03-15 16:37:09,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:09,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:09,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:09,514 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:09,861 INFO L93 Difference]: Finished difference Result 794 states and 2321 transitions. [2022-03-15 16:37:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:37:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:37:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:09,864 INFO L225 Difference]: With dead ends: 794 [2022-03-15 16:37:09,864 INFO L226 Difference]: Without dead ends: 779 [2022-03-15 16:37:09,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:37:09,865 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:09,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 138 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-15 16:37:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 469. [2022-03-15 16:37:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2022-03-15 16:37:09,873 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2022-03-15 16:37:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:09,873 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2022-03-15 16:37:09,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2022-03-15 16:37:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:09,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:09,874 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] [2022-03-15 16:37:09,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:10,087 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,SelfDestructingSolverStorable17 [2022-03-15 16:37:10,087 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1638934791, now seen corresponding path program 5 times [2022-03-15 16:37:10,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:10,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178505264] [2022-03-15 16:37:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:10,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:10,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:10,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178505264] [2022-03-15 16:37:10,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178505264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:10,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122968688] [2022-03-15 16:37:10,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:10,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:10,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:10,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:10,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:10,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:10,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:10,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:37:10,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:10,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 16:37:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:10,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:10,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:10,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-15 16:37:10,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:37:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:10,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122968688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:10,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:10,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-15 16:37:10,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788195010] [2022-03-15 16:37:10,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:10,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:37:10,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:10,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:37:10,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:37:10,689 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:11,107 INFO L93 Difference]: Finished difference Result 1008 states and 2935 transitions. [2022-03-15 16:37:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:37:11,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 [2022-03-15 16:37:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:11,111 INFO L225 Difference]: With dead ends: 1008 [2022-03-15 16:37:11,111 INFO L226 Difference]: Without dead ends: 978 [2022-03-15 16:37:11,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:11,112 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:11,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 217 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 445 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-03-15 16:37:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-03-15 16:37:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 471. [2022-03-15 16:37:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9574468085106385) internal successors, (1390), 470 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1390 transitions. [2022-03-15 16:37:11,124 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1390 transitions. Word has length 24 [2022-03-15 16:37:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:11,124 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1390 transitions. [2022-03-15 16:37:11,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1390 transitions. [2022-03-15 16:37:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:11,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:11,125 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] [2022-03-15 16:37:11,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:11,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:11,341 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash -931811517, now seen corresponding path program 6 times [2022-03-15 16:37:11,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:11,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102568213] [2022-03-15 16:37:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:11,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:11,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:11,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102568213] [2022-03-15 16:37:11,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102568213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:11,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285164169] [2022-03-15 16:37:11,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:11,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:11,470 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:11,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:37:11,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:37:11,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:11,668 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:37:11,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 34 [2022-03-15 16:37:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:11,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:11,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:11,814 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 12 treesize of output 17 [2022-03-15 16:37:11,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:37:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:11,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285164169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:11,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:11,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-15 16:37:11,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515287989] [2022-03-15 16:37:11,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:11,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:37:11,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:37:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:37:11,918 INFO L87 Difference]: Start difference. First operand 471 states and 1390 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:12,871 INFO L93 Difference]: Finished difference Result 935 states and 2730 transitions. [2022-03-15 16:37:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:37:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:37:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:12,875 INFO L225 Difference]: With dead ends: 935 [2022-03-15 16:37:12,875 INFO L226 Difference]: Without dead ends: 920 [2022-03-15 16:37:12,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:37:12,876 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:12,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 575 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-03-15 16:37:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-15 16:37:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 487. [2022-03-15 16:37:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.9794238683127574) internal successors, (1448), 486 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1448 transitions. [2022-03-15 16:37:12,890 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1448 transitions. Word has length 24 [2022-03-15 16:37:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:12,890 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1448 transitions. [2022-03-15 16:37:12,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1448 transitions. [2022-03-15 16:37:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:12,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:12,891 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] [2022-03-15 16:37:12,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:13,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:13,107 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1768350663, now seen corresponding path program 7 times [2022-03-15 16:37:13,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:13,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068211549] [2022-03-15 16:37:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:13,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:13,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:13,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068211549] [2022-03-15 16:37:13,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068211549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:13,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904391711] [2022-03-15 16:37:13,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:13,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:13,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:13,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:13,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:37:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:13,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:13,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-15 16:37:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:13,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:13,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:13,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-15 16:37:13,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:37:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:13,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904391711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:13,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:13,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-15 16:37:13,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850341252] [2022-03-15 16:37:13,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:13,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:37:13,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:37:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:37:13,743 INFO L87 Difference]: Start difference. First operand 487 states and 1448 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:14,148 INFO L93 Difference]: Finished difference Result 1068 states and 3118 transitions. [2022-03-15 16:37:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:37:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:37:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:14,152 INFO L225 Difference]: With dead ends: 1068 [2022-03-15 16:37:14,152 INFO L226 Difference]: Without dead ends: 1038 [2022-03-15 16:37:14,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:14,153 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 226 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:14,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 187 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 434 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-03-15 16:37:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-03-15 16:37:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 483. [2022-03-15 16:37:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.975103734439834) internal successors, (1434), 482 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1434 transitions. [2022-03-15 16:37:14,163 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1434 transitions. Word has length 24 [2022-03-15 16:37:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:14,163 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1434 transitions. [2022-03-15 16:37:14,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1434 transitions. [2022-03-15 16:37:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:14,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:14,164 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] [2022-03-15 16:37:14,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:14,380 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,SelfDestructingSolverStorable20 [2022-03-15 16:37:14,380 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash 906932625, now seen corresponding path program 8 times [2022-03-15 16:37:14,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:14,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750776607] [2022-03-15 16:37:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:14,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:14,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750776607] [2022-03-15 16:37:14,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750776607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:14,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311987562] [2022-03-15 16:37:14,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:14,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:14,550 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:14,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:37:14,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:14,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:14,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-03-15 16:37:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:14,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:14,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:14,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-15 16:37:14,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:37:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:14,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311987562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:14,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:14,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-15 16:37:14,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81882801] [2022-03-15 16:37:14,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:14,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:37:14,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:37:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:37:14,955 INFO L87 Difference]: Start difference. First operand 483 states and 1434 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:16,455 INFO L93 Difference]: Finished difference Result 1208 states and 3557 transitions. [2022-03-15 16:37:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:37:16,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:37:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:16,460 INFO L225 Difference]: With dead ends: 1208 [2022-03-15 16:37:16,460 INFO L226 Difference]: Without dead ends: 1193 [2022-03-15 16:37:16,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:37:16,461 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 231 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:16,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-03-15 16:37:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 473. [2022-03-15 16:37:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9533898305084745) internal successors, (1394), 472 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1394 transitions. [2022-03-15 16:37:16,471 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1394 transitions. Word has length 24 [2022-03-15 16:37:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:16,471 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1394 transitions. [2022-03-15 16:37:16,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1394 transitions. [2022-03-15 16:37:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:37:16,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:16,472 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] [2022-03-15 16:37:16,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:16,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:16,681 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1310802373, now seen corresponding path program 9 times [2022-03-15 16:37:16,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:16,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895580944] [2022-03-15 16:37:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:16,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:16,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895580944] [2022-03-15 16:37:16,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895580944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:16,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72408725] [2022-03-15 16:37:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:16,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:16,819 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:16,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:37:16,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:37:16,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:16,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:37:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:17,071 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:37:17,071 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 35 treesize of output 31 [2022-03-15 16:37:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:17,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:17,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:37:17,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-15 16:37:17,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:37:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:17,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72408725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:17,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:17,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-15 16:37:17,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779883180] [2022-03-15 16:37:17,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:17,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:37:17,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:37:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:37:17,259 INFO L87 Difference]: Start difference. First operand 473 states and 1394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:17,910 INFO L93 Difference]: Finished difference Result 904 states and 2639 transitions. [2022-03-15 16:37:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:37:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:37:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:17,913 INFO L225 Difference]: With dead ends: 904 [2022-03-15 16:37:17,913 INFO L226 Difference]: Without dead ends: 889 [2022-03-15 16:37:17,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:37:17,914 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:17,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 177 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 422 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-03-15 16:37:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-15 16:37:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 471. [2022-03-15 16:37:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2022-03-15 16:37:17,922 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2022-03-15 16:37:17,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:17,923 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2022-03-15 16:37:17,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2022-03-15 16:37:17,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:17,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:17,924 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] [2022-03-15 16:37:17,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:18,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:18,139 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2134065829, now seen corresponding path program 3 times [2022-03-15 16:37:18,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:18,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174516388] [2022-03-15 16:37:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:18,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:18,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174516388] [2022-03-15 16:37:18,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174516388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:18,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436291567] [2022-03-15 16:37:18,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:18,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:18,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:18,176 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:18,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:37:18,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:37:18,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:18,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:18,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:18,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436291567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:18,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:18,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:37:18,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350367686] [2022-03-15 16:37:18,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:18,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:37:18,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:37:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:37:18,396 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:19,659 INFO L93 Difference]: Finished difference Result 3570 states and 10088 transitions. [2022-03-15 16:37:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 16:37:19,660 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:19,667 INFO L225 Difference]: With dead ends: 3570 [2022-03-15 16:37:19,667 INFO L226 Difference]: Without dead ends: 3570 [2022-03-15 16:37:19,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1738, Invalid=6272, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:37:19,670 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 590 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:19,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 330 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:37:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-03-15 16:37:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 658. [2022-03-15 16:37:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.2739726027397262) internal successors, (2151), 657 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2151 transitions. [2022-03-15 16:37:19,699 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2151 transitions. Word has length 27 [2022-03-15 16:37:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:19,699 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2151 transitions. [2022-03-15 16:37:19,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2151 transitions. [2022-03-15 16:37:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:19,701 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:19,701 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] [2022-03-15 16:37:19,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:19,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 16:37:19,906 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:19,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1967000799, now seen corresponding path program 4 times [2022-03-15 16:37:19,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:19,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104209800] [2022-03-15 16:37:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:19,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:19,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:19,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104209800] [2022-03-15 16:37:19,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104209800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:19,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242011290] [2022-03-15 16:37:19,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:19,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:19,942 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:19,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:37:19,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:19,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:20,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:20,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242011290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:20,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:20,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:37:20,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173567974] [2022-03-15 16:37:20,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:20,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:37:20,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:20,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:37:20,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:37:20,199 INFO L87 Difference]: Start difference. First operand 658 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:21,958 INFO L93 Difference]: Finished difference Result 3557 states and 10114 transitions. [2022-03-15 16:37:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 16:37:21,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:21,969 INFO L225 Difference]: With dead ends: 3557 [2022-03-15 16:37:21,970 INFO L226 Difference]: Without dead ends: 3557 [2022-03-15 16:37:21,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2334, Invalid=9876, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 16:37:21,972 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 639 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:21,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 439 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:37:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-03-15 16:37:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 642. [2022-03-15 16:37:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.2449297971918876) internal successors, (2080), 641 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2080 transitions. [2022-03-15 16:37:22,002 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2080 transitions. Word has length 27 [2022-03-15 16:37:22,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:22,003 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2080 transitions. [2022-03-15 16:37:22,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2080 transitions. [2022-03-15 16:37:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:22,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:22,004 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] [2022-03-15 16:37:22,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:22,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:22,220 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1712302181, now seen corresponding path program 5 times [2022-03-15 16:37:22,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:22,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904330254] [2022-03-15 16:37:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:22,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:22,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904330254] [2022-03-15 16:37:22,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904330254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:22,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424585068] [2022-03-15 16:37:22,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:22,263 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:22,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:37:22,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:37:22,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:22,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:22,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:22,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:22,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424585068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:22,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:22,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:37:22,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875886207] [2022-03-15 16:37:22,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:22,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:37:22,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:37:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:37:22,480 INFO L87 Difference]: Start difference. First operand 642 states and 2080 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:23,411 INFO L93 Difference]: Finished difference Result 2695 states and 7631 transitions. [2022-03-15 16:37:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:37:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 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 27 [2022-03-15 16:37:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:23,416 INFO L225 Difference]: With dead ends: 2695 [2022-03-15 16:37:23,417 INFO L226 Difference]: Without dead ends: 2695 [2022-03-15 16:37:23,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1021, Invalid=3671, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:37:23,418 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 387 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:23,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 280 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-03-15 16:37:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 650. [2022-03-15 16:37:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.2342064714946073) internal successors, (2099), 649 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2099 transitions. [2022-03-15 16:37:23,447 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2099 transitions. Word has length 27 [2022-03-15 16:37:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:23,447 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2099 transitions. [2022-03-15 16:37:23,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2099 transitions. [2022-03-15 16:37:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:23,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:23,449 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] [2022-03-15 16:37:23,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:23,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:23,659 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash 599427504, now seen corresponding path program 10 times [2022-03-15 16:37:23,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:23,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604839878] [2022-03-15 16:37:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:23,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:23,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604839878] [2022-03-15 16:37:23,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604839878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:23,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003767245] [2022-03-15 16:37:23,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:23,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:23,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:23,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:23,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:23,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:23,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:23,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:37:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:23,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:23,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003767245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:23,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:23,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:37:23,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232097338] [2022-03-15 16:37:23,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:23,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:37:23,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:23,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:37:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:37:23,890 INFO L87 Difference]: Start difference. First operand 650 states and 2099 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:24,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:24,624 INFO L93 Difference]: Finished difference Result 2700 states and 7794 transitions. [2022-03-15 16:37:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:37:24,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 27 [2022-03-15 16:37:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:24,630 INFO L225 Difference]: With dead ends: 2700 [2022-03-15 16:37:24,630 INFO L226 Difference]: Without dead ends: 2700 [2022-03-15 16:37:24,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:37:24,631 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 418 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:24,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 242 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:37:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2022-03-15 16:37:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 669. [2022-03-15 16:37:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2230538922155687) internal successors, (2153), 668 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2153 transitions. [2022-03-15 16:37:24,651 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2153 transitions. Word has length 27 [2022-03-15 16:37:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:24,651 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2153 transitions. [2022-03-15 16:37:24,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2153 transitions. [2022-03-15 16:37:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:24,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:24,652 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] [2022-03-15 16:37:24,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:24,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:24,868 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1019160408, now seen corresponding path program 6 times [2022-03-15 16:37:24,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:24,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017399346] [2022-03-15 16:37:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:24,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:24,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:24,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017399346] [2022-03-15 16:37:24,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017399346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:24,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300317228] [2022-03-15 16:37:24,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:24,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:24,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:24,897 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:24,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:37:24,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:37:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:24,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:25,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300317228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:25,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:25,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:37:25,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277760592] [2022-03-15 16:37:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:25,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:37:25,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:37:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:37:25,040 INFO L87 Difference]: Start difference. First operand 669 states and 2153 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:25,191 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2022-03-15 16:37:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:37:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 27 [2022-03-15 16:37:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:25,195 INFO L225 Difference]: With dead ends: 1474 [2022-03-15 16:37:25,195 INFO L226 Difference]: Without dead ends: 1450 [2022-03-15 16:37:25,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:37:25,196 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:25,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 85 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-03-15 16:37:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1011. [2022-03-15 16:37:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.291089108910891) internal successors, (3324), 1010 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3324 transitions. [2022-03-15 16:37:25,215 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3324 transitions. Word has length 27 [2022-03-15 16:37:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:25,215 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3324 transitions. [2022-03-15 16:37:25,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3324 transitions. [2022-03-15 16:37:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:25,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:25,217 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, 1, 1, 1] [2022-03-15 16:37:25,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:25,433 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,SelfDestructingSolverStorable27 [2022-03-15 16:37:25,433 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:25,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1294087731, now seen corresponding path program 1 times [2022-03-15 16:37:25,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:25,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228557124] [2022-03-15 16:37:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:25,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:25,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:25,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228557124] [2022-03-15 16:37:25,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228557124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:25,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559778687] [2022-03-15 16:37:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:25,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:25,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:25,467 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:25,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:37:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:25,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:25,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:25,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559778687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:25,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:25,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:37:25,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006423437] [2022-03-15 16:37:25,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:25,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:25,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:25,633 INFO L87 Difference]: Start difference. First operand 1011 states and 3324 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:26,131 INFO L93 Difference]: Finished difference Result 2336 states and 6930 transitions. [2022-03-15 16:37:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:37:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 27 [2022-03-15 16:37:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:26,135 INFO L225 Difference]: With dead ends: 2336 [2022-03-15 16:37:26,135 INFO L226 Difference]: Without dead ends: 2310 [2022-03-15 16:37:26,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:37:26,136 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 334 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:26,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 135 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:37:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-03-15 16:37:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1264. [2022-03-15 16:37:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.32541567695962) internal successors, (4200), 1263 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4200 transitions. [2022-03-15 16:37:26,160 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4200 transitions. Word has length 27 [2022-03-15 16:37:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:26,160 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4200 transitions. [2022-03-15 16:37:26,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4200 transitions. [2022-03-15 16:37:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:26,163 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:26,163 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] [2022-03-15 16:37:26,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:26,378 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,SelfDestructingSolverStorable28 [2022-03-15 16:37:26,378 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:26,379 INFO L85 PathProgramCache]: Analyzing trace with hash -374136488, now seen corresponding path program 11 times [2022-03-15 16:37:26,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:26,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434715520] [2022-03-15 16:37:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:26,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:26,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:26,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434715520] [2022-03-15 16:37:26,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434715520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:26,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747848955] [2022-03-15 16:37:26,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:26,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:26,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:26,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:26,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:37:26,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:37:26,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:26,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:26,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747848955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:26,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:26,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:37:26,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157304774] [2022-03-15 16:37:26,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:26,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:37:26,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:37:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:37:26,594 INFO L87 Difference]: Start difference. First operand 1264 states and 4200 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:26,889 INFO L93 Difference]: Finished difference Result 3138 states and 9728 transitions. [2022-03-15 16:37:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:37:26,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2022-03-15 16:37:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:26,895 INFO L225 Difference]: With dead ends: 3138 [2022-03-15 16:37:26,895 INFO L226 Difference]: Without dead ends: 3099 [2022-03-15 16:37:26,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:37:26,896 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 244 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:26,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 212 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2022-03-15 16:37:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 1754. [2022-03-15 16:37:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.407872219053052) internal successors, (5974), 1753 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5974 transitions. [2022-03-15 16:37:26,939 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5974 transitions. Word has length 27 [2022-03-15 16:37:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:26,939 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5974 transitions. [2022-03-15 16:37:26,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5974 transitions. [2022-03-15 16:37:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:26,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:26,942 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, 1, 1, 1] [2022-03-15 16:37:26,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:27,147 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1217309363, now seen corresponding path program 2 times [2022-03-15 16:37:27,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:27,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827161239] [2022-03-15 16:37:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:27,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:27,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:27,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827161239] [2022-03-15 16:37:27,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827161239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:27,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755292825] [2022-03-15 16:37:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:27,183 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:27,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:37:27,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:27,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:27,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:27,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755292825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:27,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:27,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:37:27,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388566388] [2022-03-15 16:37:27,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:27,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:27,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:27,352 INFO L87 Difference]: Start difference. First operand 1754 states and 5974 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:27,740 INFO L93 Difference]: Finished difference Result 2934 states and 9093 transitions. [2022-03-15 16:37:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:37:27,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:27,745 INFO L225 Difference]: With dead ends: 2934 [2022-03-15 16:37:27,745 INFO L226 Difference]: Without dead ends: 2912 [2022-03-15 16:37:27,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:37:27,745 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 282 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:27,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 109 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-03-15 16:37:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 1747. [2022-03-15 16:37:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.413516609392898) internal successors, (5960), 1746 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5960 transitions. [2022-03-15 16:37:27,779 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5960 transitions. Word has length 27 [2022-03-15 16:37:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:27,779 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 5960 transitions. [2022-03-15 16:37:27,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5960 transitions. [2022-03-15 16:37:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:27,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:27,782 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, 1, 1, 1] [2022-03-15 16:37:27,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:27,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:27,995 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2125115793, now seen corresponding path program 3 times [2022-03-15 16:37:27,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:27,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331180922] [2022-03-15 16:37:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:27,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:28,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:28,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331180922] [2022-03-15 16:37:28,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331180922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:28,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647681087] [2022-03-15 16:37:28,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:28,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:28,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:28,025 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:28,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:37:28,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:37:28,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:28,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:28,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:28,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647681087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:28,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:28,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 16:37:28,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581728887] [2022-03-15 16:37:28,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:28,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:37:28,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:37:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:28,181 INFO L87 Difference]: Start difference. First operand 1747 states and 5960 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:28,547 INFO L93 Difference]: Finished difference Result 4585 states and 13921 transitions. [2022-03-15 16:37:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:37:28,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2022-03-15 16:37:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:28,556 INFO L225 Difference]: With dead ends: 4585 [2022-03-15 16:37:28,556 INFO L226 Difference]: Without dead ends: 4559 [2022-03-15 16:37:28,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:28,556 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 355 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:28,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 98 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2022-03-15 16:37:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 1846. [2022-03-15 16:37:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.4655826558265583) internal successors, (6394), 1845 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6394 transitions. [2022-03-15 16:37:28,600 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6394 transitions. Word has length 27 [2022-03-15 16:37:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:28,600 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6394 transitions. [2022-03-15 16:37:28,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6394 transitions. [2022-03-15 16:37:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:28,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:28,603 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] [2022-03-15 16:37:28,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-15 16:37:28,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:28,810 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:28,810 INFO L85 PathProgramCache]: Analyzing trace with hash -665957700, now seen corresponding path program 7 times [2022-03-15 16:37:28,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:28,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080211280] [2022-03-15 16:37:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:28,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:28,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:28,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080211280] [2022-03-15 16:37:28,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080211280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:28,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886820019] [2022-03-15 16:37:28,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:28,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:28,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:28,841 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:28,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:37:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:28,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:28,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:28,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:29,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886820019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:29,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:29,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-15 16:37:29,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915617110] [2022-03-15 16:37:29,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:29,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:37:29,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:29,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:37:29,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:29,011 INFO L87 Difference]: Start difference. First operand 1846 states and 6394 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:29,257 INFO L93 Difference]: Finished difference Result 3417 states and 10465 transitions. [2022-03-15 16:37:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:37:29,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-03-15 16:37:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:29,263 INFO L225 Difference]: With dead ends: 3417 [2022-03-15 16:37:29,263 INFO L226 Difference]: Without dead ends: 3417 [2022-03-15 16:37:29,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:37:29,263 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 356 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:29,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 125 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:29,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2022-03-15 16:37:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 1858. [2022-03-15 16:37:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.4426494345718903) internal successors, (6393), 1857 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6393 transitions. [2022-03-15 16:37:29,307 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6393 transitions. Word has length 27 [2022-03-15 16:37:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:29,307 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6393 transitions. [2022-03-15 16:37:29,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6393 transitions. [2022-03-15 16:37:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:29,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:29,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:29,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 16:37:29,525 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,SelfDestructingSolverStorable32 [2022-03-15 16:37:29,525 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1012536837, now seen corresponding path program 8 times [2022-03-15 16:37:29,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:29,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637758138] [2022-03-15 16:37:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:29,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:29,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:29,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637758138] [2022-03-15 16:37:29,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637758138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:29,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2331487] [2022-03-15 16:37:29,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:29,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:29,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:29,564 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:29,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:37:29,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:29,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:29,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2331487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:29,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:29,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-15 16:37:29,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047803098] [2022-03-15 16:37:29,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:29,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:29,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:29,743 INFO L87 Difference]: Start difference. First operand 1858 states and 6393 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:30,482 INFO L93 Difference]: Finished difference Result 7165 states and 21721 transitions. [2022-03-15 16:37:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:37:30,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:30,495 INFO L225 Difference]: With dead ends: 7165 [2022-03-15 16:37:30,495 INFO L226 Difference]: Without dead ends: 7165 [2022-03-15 16:37:30,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:37:30,496 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 535 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:30,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 215 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-03-15 16:37:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2005. [2022-03-15 16:37:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.4865269461077846) internal successors, (6987), 2004 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6987 transitions. [2022-03-15 16:37:30,568 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6987 transitions. Word has length 27 [2022-03-15 16:37:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:30,568 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 6987 transitions. [2022-03-15 16:37:30,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6987 transitions. [2022-03-15 16:37:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:30,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:30,571 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, 1, 1, 1] [2022-03-15 16:37:30,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:30,786 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,SelfDestructingSolverStorable33 [2022-03-15 16:37:30,786 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:30,786 INFO L85 PathProgramCache]: Analyzing trace with hash 970143219, now seen corresponding path program 4 times [2022-03-15 16:37:30,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:30,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320502281] [2022-03-15 16:37:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:30,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:30,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320502281] [2022-03-15 16:37:30,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320502281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:30,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690683278] [2022-03-15 16:37:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:30,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:30,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:30,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:30,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:37:30,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:30,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:30,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:30,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690683278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:30,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:30,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 16:37:30,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108847044] [2022-03-15 16:37:30,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:30,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:37:30,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:37:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:30,963 INFO L87 Difference]: Start difference. First operand 2005 states and 6987 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:31,367 INFO L93 Difference]: Finished difference Result 4592 states and 14316 transitions. [2022-03-15 16:37:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:37:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2022-03-15 16:37:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:31,375 INFO L225 Difference]: With dead ends: 4592 [2022-03-15 16:37:31,375 INFO L226 Difference]: Without dead ends: 4592 [2022-03-15 16:37:31,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:37:31,375 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 252 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:31,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 148 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2022-03-15 16:37:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 2181. [2022-03-15 16:37:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.5022935779816513) internal successors, (7635), 2180 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7635 transitions. [2022-03-15 16:37:31,456 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7635 transitions. Word has length 27 [2022-03-15 16:37:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:31,456 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 7635 transitions. [2022-03-15 16:37:31,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7635 transitions. [2022-03-15 16:37:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:31,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:31,460 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] [2022-03-15 16:37:31,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:31,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 16:37:31,660 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1201755135, now seen corresponding path program 9 times [2022-03-15 16:37:31,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:31,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36071022] [2022-03-15 16:37:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:31,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:31,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:31,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36071022] [2022-03-15 16:37:31,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36071022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:31,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304103294] [2022-03-15 16:37:31,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:31,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:31,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:31,697 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:31,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:37:31,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:37:31,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:31,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:31,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:31,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304103294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:31,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:31,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-15 16:37:31,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793463226] [2022-03-15 16:37:31,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:31,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:31,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:31,858 INFO L87 Difference]: Start difference. First operand 2181 states and 7635 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:32,499 INFO L93 Difference]: Finished difference Result 7070 states and 21694 transitions. [2022-03-15 16:37:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:37:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:32,514 INFO L225 Difference]: With dead ends: 7070 [2022-03-15 16:37:32,514 INFO L226 Difference]: Without dead ends: 7062 [2022-03-15 16:37:32,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:37:32,515 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 523 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:32,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 191 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:37:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7062 states. [2022-03-15 16:37:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7062 to 2191. [2022-03-15 16:37:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 3.491324200913242) internal successors, (7646), 2190 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7646 transitions. [2022-03-15 16:37:32,612 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7646 transitions. Word has length 27 [2022-03-15 16:37:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:32,612 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 7646 transitions. [2022-03-15 16:37:32,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7646 transitions. [2022-03-15 16:37:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:32,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:32,616 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] [2022-03-15 16:37:32,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 16:37:32,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:32,825 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash 187766081, now seen corresponding path program 10 times [2022-03-15 16:37:32,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:32,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588026795] [2022-03-15 16:37:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:32,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:32,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:32,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588026795] [2022-03-15 16:37:32,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588026795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:32,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387220556] [2022-03-15 16:37:32,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:32,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:32,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:32,859 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:32,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:37:32,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:32,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:32,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:33,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387220556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:33,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:33,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-15 16:37:33,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172500044] [2022-03-15 16:37:33,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:33,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:33,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:33,056 INFO L87 Difference]: Start difference. First operand 2191 states and 7646 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:34,189 INFO L93 Difference]: Finished difference Result 7232 states and 21469 transitions. [2022-03-15 16:37:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:37:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:34,201 INFO L225 Difference]: With dead ends: 7232 [2022-03-15 16:37:34,201 INFO L226 Difference]: Without dead ends: 7232 [2022-03-15 16:37:34,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:37:34,202 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:34,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 303 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:37:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-03-15 16:37:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 2309. [2022-03-15 16:37:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.470103986135182) internal successors, (8009), 2308 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8009 transitions. [2022-03-15 16:37:34,267 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8009 transitions. Word has length 27 [2022-03-15 16:37:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:34,267 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8009 transitions. [2022-03-15 16:37:34,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8009 transitions. [2022-03-15 16:37:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:34,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:34,271 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] [2022-03-15 16:37:34,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 16:37:34,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:37:34,473 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1970415551, now seen corresponding path program 11 times [2022-03-15 16:37:34,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:34,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236610144] [2022-03-15 16:37:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:34,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:34,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236610144] [2022-03-15 16:37:34,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236610144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:34,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418315413] [2022-03-15 16:37:34,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:34,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:34,508 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:34,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:37:34,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:37:34,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:34,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:34,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418315413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:34,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:34,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-15 16:37:34,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237699081] [2022-03-15 16:37:34,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:34,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:34,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:34,685 INFO L87 Difference]: Start difference. First operand 2309 states and 8009 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:35,937 INFO L93 Difference]: Finished difference Result 7083 states and 21556 transitions. [2022-03-15 16:37:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 16:37:35,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:35,950 INFO L225 Difference]: With dead ends: 7083 [2022-03-15 16:37:35,950 INFO L226 Difference]: Without dead ends: 7075 [2022-03-15 16:37:35,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1646, Invalid=6010, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:37:35,951 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 589 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:35,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 293 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:37:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-03-15 16:37:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 2309. [2022-03-15 16:37:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.468370883882149) internal successors, (8005), 2308 states have internal predecessors, (8005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8005 transitions. [2022-03-15 16:37:36,013 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8005 transitions. Word has length 27 [2022-03-15 16:37:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:36,014 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8005 transitions. [2022-03-15 16:37:36,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8005 transitions. [2022-03-15 16:37:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:36,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:36,017 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] [2022-03-15 16:37:36,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:36,217 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,SelfDestructingSolverStorable37 [2022-03-15 16:37:36,218 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:36,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1109408773, now seen corresponding path program 12 times [2022-03-15 16:37:36,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:36,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133054418] [2022-03-15 16:37:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:36,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:36,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133054418] [2022-03-15 16:37:36,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133054418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:36,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502950410] [2022-03-15 16:37:36,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:36,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:36,264 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:36,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:37:36,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:37:36,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:36,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:36,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:36,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:36,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502950410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:36,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:36,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:37:36,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107914875] [2022-03-15 16:37:36,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:36,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:37:36,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:37:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:37:36,471 INFO L87 Difference]: Start difference. First operand 2309 states and 8005 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:37,335 INFO L93 Difference]: Finished difference Result 6206 states and 18904 transitions. [2022-03-15 16:37:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:37:37,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 27 [2022-03-15 16:37:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:37,346 INFO L225 Difference]: With dead ends: 6206 [2022-03-15 16:37:37,346 INFO L226 Difference]: Without dead ends: 6206 [2022-03-15 16:37:37,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:37:37,347 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 422 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:37,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 301 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6206 states. [2022-03-15 16:37:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6206 to 2335. [2022-03-15 16:37:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2334 states have (on average 3.4670094258783206) internal successors, (8092), 2334 states have internal predecessors, (8092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 8092 transitions. [2022-03-15 16:37:37,433 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 8092 transitions. Word has length 27 [2022-03-15 16:37:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:37,433 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 8092 transitions. [2022-03-15 16:37:37,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 8092 transitions. [2022-03-15 16:37:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:37,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:37,437 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] [2022-03-15 16:37:37,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 16:37:37,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:37:37,637 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:37,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2007542286, now seen corresponding path program 12 times [2022-03-15 16:37:37,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:37,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469608600] [2022-03-15 16:37:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:37,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:37,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:37,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469608600] [2022-03-15 16:37:37,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469608600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:37,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058885619] [2022-03-15 16:37:37,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:37,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:37,675 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:37,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:37:37,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:37:37,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:37,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:37,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:37,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058885619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:37,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:37,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:37:37,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439400536] [2022-03-15 16:37:37,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:37,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:37:37,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:37:37,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:37:37,847 INFO L87 Difference]: Start difference. First operand 2335 states and 8092 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-03-15 16:37:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:38,383 INFO L93 Difference]: Finished difference Result 6462 states and 20430 transitions. [2022-03-15 16:37:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:37:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2022-03-15 16:37:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:38,394 INFO L225 Difference]: With dead ends: 6462 [2022-03-15 16:37:38,394 INFO L226 Difference]: Without dead ends: 6462 [2022-03-15 16:37:38,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:37:38,395 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 377 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:38,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 169 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:37:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-03-15 16:37:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 2361. [2022-03-15 16:37:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.465677966101695) internal successors, (8179), 2360 states have internal predecessors, (8179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8179 transitions. [2022-03-15 16:37:38,457 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8179 transitions. Word has length 27 [2022-03-15 16:37:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:38,457 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8179 transitions. [2022-03-15 16:37:38,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-03-15 16:37:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8179 transitions. [2022-03-15 16:37:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:38,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:38,461 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] [2022-03-15 16:37:38,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:38,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:37:38,662 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2095266658, now seen corresponding path program 13 times [2022-03-15 16:37:38,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:38,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555081804] [2022-03-15 16:37:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:38,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:38,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:38,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555081804] [2022-03-15 16:37:38,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555081804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:38,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859531540] [2022-03-15 16:37:38,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:38,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:38,698 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:38,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:37:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:38,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:38,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:38,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:38,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859531540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:38,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:38,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:37:38,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18880573] [2022-03-15 16:37:38,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:38,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:37:38,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:37:38,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:37:38,852 INFO L87 Difference]: Start difference. First operand 2361 states and 8179 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-03-15 16:37:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:39,468 INFO L93 Difference]: Finished difference Result 6568 states and 20814 transitions. [2022-03-15 16:37:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:37:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2022-03-15 16:37:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:39,480 INFO L225 Difference]: With dead ends: 6568 [2022-03-15 16:37:39,480 INFO L226 Difference]: Without dead ends: 6568 [2022-03-15 16:37:39,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:37:39,481 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 396 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:39,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 188 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:37:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6568 states. [2022-03-15 16:37:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6568 to 2497. [2022-03-15 16:37:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 3.4451121794871793) internal successors, (8599), 2496 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 8599 transitions. [2022-03-15 16:37:39,550 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 8599 transitions. Word has length 27 [2022-03-15 16:37:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:39,550 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 8599 transitions. [2022-03-15 16:37:39,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-03-15 16:37:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 8599 transitions. [2022-03-15 16:37:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:39,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:39,554 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] [2022-03-15 16:37:39,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:39,754 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,SelfDestructingSolverStorable40 [2022-03-15 16:37:39,754 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1473299244, now seen corresponding path program 14 times [2022-03-15 16:37:39,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:39,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625158091] [2022-03-15 16:37:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:39,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:39,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625158091] [2022-03-15 16:37:39,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625158091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:39,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578546804] [2022-03-15 16:37:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:39,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:39,789 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:39,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:37:39,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:39,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:39,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578546804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:39,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:39,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 16:37:39,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615960606] [2022-03-15 16:37:39,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:39,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:39,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:39,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:39,957 INFO L87 Difference]: Start difference. First operand 2497 states and 8599 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:40,227 INFO L93 Difference]: Finished difference Result 5147 states and 16513 transitions. [2022-03-15 16:37:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:37:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:40,237 INFO L225 Difference]: With dead ends: 5147 [2022-03-15 16:37:40,237 INFO L226 Difference]: Without dead ends: 5147 [2022-03-15 16:37:40,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:37:40,238 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 291 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:40,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 183 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-03-15 16:37:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 2941. [2022-03-15 16:37:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2940 states have (on average 3.463265306122449) internal successors, (10182), 2940 states have internal predecessors, (10182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 10182 transitions. [2022-03-15 16:37:40,309 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 10182 transitions. Word has length 27 [2022-03-15 16:37:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:40,309 INFO L470 AbstractCegarLoop]: Abstraction has 2941 states and 10182 transitions. [2022-03-15 16:37:40,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 10182 transitions. [2022-03-15 16:37:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:40,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:40,314 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] [2022-03-15 16:37:40,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:37:40,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:40,523 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash 649769698, now seen corresponding path program 15 times [2022-03-15 16:37:40,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:40,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366321258] [2022-03-15 16:37:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:40,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:40,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:40,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366321258] [2022-03-15 16:37:40,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366321258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:40,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248824658] [2022-03-15 16:37:40,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:40,557 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:40,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:37:40,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:37:40,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:40,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:40,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:40,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248824658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:40,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:40,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:37:40,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914479532] [2022-03-15 16:37:40,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:40,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:37:40,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:40,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:37:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:37:40,698 INFO L87 Difference]: Start difference. First operand 2941 states and 10182 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-03-15 16:37:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:41,240 INFO L93 Difference]: Finished difference Result 7126 states and 23054 transitions. [2022-03-15 16:37:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:37:41,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2022-03-15 16:37:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:41,254 INFO L225 Difference]: With dead ends: 7126 [2022-03-15 16:37:41,255 INFO L226 Difference]: Without dead ends: 7122 [2022-03-15 16:37:41,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:37:41,255 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 386 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:41,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 197 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:37:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-03-15 16:37:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 2923. [2022-03-15 16:37:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.4603011635865846) internal successors, (10111), 2922 states have internal predecessors, (10111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 10111 transitions. [2022-03-15 16:37:41,359 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 10111 transitions. Word has length 27 [2022-03-15 16:37:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:41,359 INFO L470 AbstractCegarLoop]: Abstraction has 2923 states and 10111 transitions. [2022-03-15 16:37:41,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2022-03-15 16:37:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 10111 transitions. [2022-03-15 16:37:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:41,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:41,364 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, 1, 1, 1] [2022-03-15 16:37:41,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:41,566 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,SelfDestructingSolverStorable42 [2022-03-15 16:37:41,566 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:41,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1999520671, now seen corresponding path program 5 times [2022-03-15 16:37:41,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:41,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172852865] [2022-03-15 16:37:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:41,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:41,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172852865] [2022-03-15 16:37:41,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172852865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:41,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104550955] [2022-03-15 16:37:41,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:41,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:41,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:41,593 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:41,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:37:41,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:41,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:41,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:41,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104550955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:41,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:41,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:37:41,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250963109] [2022-03-15 16:37:41,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:41,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:41,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:41,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:41,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:41,751 INFO L87 Difference]: Start difference. First operand 2923 states and 10111 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:42,149 INFO L93 Difference]: Finished difference Result 4977 states and 15922 transitions. [2022-03-15 16:37:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:37:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:42,158 INFO L225 Difference]: With dead ends: 4977 [2022-03-15 16:37:42,158 INFO L226 Difference]: Without dead ends: 4962 [2022-03-15 16:37:42,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:37:42,159 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 350 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:42,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 117 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2022-03-15 16:37:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3080. [2022-03-15 16:37:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 3.505034101981163) internal successors, (10792), 3079 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 10792 transitions. [2022-03-15 16:37:42,217 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 10792 transitions. Word has length 27 [2022-03-15 16:37:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:42,218 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 10792 transitions. [2022-03-15 16:37:42,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 10792 transitions. [2022-03-15 16:37:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:42,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:42,222 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, 1, 1, 1] [2022-03-15 16:37:42,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 16:37:42,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:42,423 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1750676451, now seen corresponding path program 6 times [2022-03-15 16:37:42,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:42,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609376806] [2022-03-15 16:37:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:42,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:42,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609376806] [2022-03-15 16:37:42,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609376806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:42,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071473239] [2022-03-15 16:37:42,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:42,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:42,452 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:42,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:37:42,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:37:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:42,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:42,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071473239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:42,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:42,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:37:42,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192125901] [2022-03-15 16:37:42,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:42,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:42,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:42,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:42,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:42,632 INFO L87 Difference]: Start difference. First operand 3080 states and 10792 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:43,099 INFO L93 Difference]: Finished difference Result 5951 states and 18520 transitions. [2022-03-15 16:37:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:37:43,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:43,110 INFO L225 Difference]: With dead ends: 5951 [2022-03-15 16:37:43,111 INFO L226 Difference]: Without dead ends: 5951 [2022-03-15 16:37:43,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:37:43,111 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 360 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:43,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 139 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-03-15 16:37:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 2989. [2022-03-15 16:37:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2988 states have (on average 3.4745649263721554) internal successors, (10382), 2988 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 10382 transitions. [2022-03-15 16:37:43,177 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 10382 transitions. Word has length 27 [2022-03-15 16:37:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:43,178 INFO L470 AbstractCegarLoop]: Abstraction has 2989 states and 10382 transitions. [2022-03-15 16:37:43,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 10382 transitions. [2022-03-15 16:37:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:43,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:43,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:37:43,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:37:43,382 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,SelfDestructingSolverStorable44 [2022-03-15 16:37:43,383 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1579991646, now seen corresponding path program 16 times [2022-03-15 16:37:43,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:43,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979155086] [2022-03-15 16:37:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:43,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:43,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979155086] [2022-03-15 16:37:43,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979155086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:43,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354858971] [2022-03-15 16:37:43,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:43,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:43,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:43,418 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:43,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:37:43,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:43,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:43,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:43,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:43,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354858971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:43,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:43,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:37:43,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899447675] [2022-03-15 16:37:43,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:43,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:43,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:43,621 INFO L87 Difference]: Start difference. First operand 2989 states and 10382 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:44,982 INFO L93 Difference]: Finished difference Result 11830 states and 37070 transitions. [2022-03-15 16:37:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:37:44,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:45,006 INFO L225 Difference]: With dead ends: 11830 [2022-03-15 16:37:45,006 INFO L226 Difference]: Without dead ends: 11830 [2022-03-15 16:37:45,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1772, Invalid=6418, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 16:37:45,008 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 706 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:45,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 311 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:37:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11830 states. [2022-03-15 16:37:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11830 to 3006. [2022-03-15 16:37:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.485524126455907) internal successors, (10474), 3005 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 10474 transitions. [2022-03-15 16:37:45,154 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 10474 transitions. Word has length 27 [2022-03-15 16:37:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:45,154 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 10474 transitions. [2022-03-15 16:37:45,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 10474 transitions. [2022-03-15 16:37:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:45,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:45,158 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] [2022-03-15 16:37:45,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:37:45,359 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,SelfDestructingSolverStorable45 [2022-03-15 16:37:45,359 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1773892314, now seen corresponding path program 17 times [2022-03-15 16:37:45,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:45,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777254180] [2022-03-15 16:37:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:45,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:45,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:45,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777254180] [2022-03-15 16:37:45,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777254180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:45,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004065293] [2022-03-15 16:37:45,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:45,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:45,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:45,405 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:45,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:37:45,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:45,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:37:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:45,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:45,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004065293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:45,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:45,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:37:45,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154513322] [2022-03-15 16:37:45,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:45,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:45,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:45,627 INFO L87 Difference]: Start difference. First operand 3006 states and 10474 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:46,612 INFO L93 Difference]: Finished difference Result 9772 states and 30478 transitions. [2022-03-15 16:37:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:37:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:46,632 INFO L225 Difference]: With dead ends: 9772 [2022-03-15 16:37:46,632 INFO L226 Difference]: Without dead ends: 9772 [2022-03-15 16:37:46,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1283, Invalid=3829, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:37:46,637 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 609 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:46,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 289 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2022-03-15 16:37:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 2975. [2022-03-15 16:37:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.4714189643577673) internal successors, (10324), 2974 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10324 transitions. [2022-03-15 16:37:46,763 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10324 transitions. Word has length 27 [2022-03-15 16:37:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:46,763 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 10324 transitions. [2022-03-15 16:37:46,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10324 transitions. [2022-03-15 16:37:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:46,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:46,769 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, 1, 1, 1] [2022-03-15 16:37:46,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:46,972 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,SelfDestructingSolverStorable46 [2022-03-15 16:37:46,973 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash -225266257, now seen corresponding path program 7 times [2022-03-15 16:37:46,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:46,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760746649] [2022-03-15 16:37:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:46,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:47,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760746649] [2022-03-15 16:37:47,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760746649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:47,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407210410] [2022-03-15 16:37:47,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:47,003 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:47,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:37:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:47,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:47,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407210410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:47,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:47,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:37:47,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005482946] [2022-03-15 16:37:47,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:47,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:37:47,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:47,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:37:47,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:37:47,136 INFO L87 Difference]: Start difference. First operand 2975 states and 10324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:47,369 INFO L93 Difference]: Finished difference Result 4784 states and 15583 transitions. [2022-03-15 16:37:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:37:47,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 27 [2022-03-15 16:37:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:47,377 INFO L225 Difference]: With dead ends: 4784 [2022-03-15 16:37:47,377 INFO L226 Difference]: Without dead ends: 4747 [2022-03-15 16:37:47,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:47,378 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 170 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:47,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 101 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-03-15 16:37:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 3475. [2022-03-15 16:37:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3475 states, 3474 states have (on average 3.4905008635578585) internal successors, (12126), 3474 states have internal predecessors, (12126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3475 states to 3475 states and 12126 transitions. [2022-03-15 16:37:47,440 INFO L78 Accepts]: Start accepts. Automaton has 3475 states and 12126 transitions. Word has length 27 [2022-03-15 16:37:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:47,440 INFO L470 AbstractCegarLoop]: Abstraction has 3475 states and 12126 transitions. [2022-03-15 16:37:47,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3475 states and 12126 transitions. [2022-03-15 16:37:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:47,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:47,446 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, 1, 1, 1, 1, 1] [2022-03-15 16:37:47,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-15 16:37:47,646 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,SelfDestructingSolverStorable47 [2022-03-15 16:37:47,646 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:47,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1380238831, now seen corresponding path program 8 times [2022-03-15 16:37:47,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:47,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687833424] [2022-03-15 16:37:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:47,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:47,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687833424] [2022-03-15 16:37:47,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687833424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:47,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15246987] [2022-03-15 16:37:47,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:47,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:47,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:47,681 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:47,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:37:47,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:47,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:47,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:47,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15246987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:47,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:47,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:37:47,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106543401] [2022-03-15 16:37:47,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:47,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:37:47,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:37:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:37:47,815 INFO L87 Difference]: Start difference. First operand 3475 states and 12126 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:48,074 INFO L93 Difference]: Finished difference Result 4950 states and 16086 transitions. [2022-03-15 16:37:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:37:48,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 27 [2022-03-15 16:37:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:48,082 INFO L225 Difference]: With dead ends: 4950 [2022-03-15 16:37:48,082 INFO L226 Difference]: Without dead ends: 4950 [2022-03-15 16:37:48,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:48,082 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:48,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 183 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:37:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-03-15 16:37:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3463. [2022-03-15 16:37:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 3.4803581744656267) internal successors, (12049), 3462 states have internal predecessors, (12049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 12049 transitions. [2022-03-15 16:37:48,138 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 12049 transitions. Word has length 27 [2022-03-15 16:37:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:48,139 INFO L470 AbstractCegarLoop]: Abstraction has 3463 states and 12049 transitions. [2022-03-15 16:37:48,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 12049 transitions. [2022-03-15 16:37:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:48,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:48,145 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] [2022-03-15 16:37:48,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 16:37:48,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:37:48,351 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1293927831, now seen corresponding path program 13 times [2022-03-15 16:37:48,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:48,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750124677] [2022-03-15 16:37:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:48,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:48,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:48,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750124677] [2022-03-15 16:37:48,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750124677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:48,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159955434] [2022-03-15 16:37:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:48,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:48,383 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:48,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:37:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:48,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:48,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:48,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159955434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:48,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:48,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-15 16:37:48,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139056277] [2022-03-15 16:37:48,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:48,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:48,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:48,582 INFO L87 Difference]: Start difference. First operand 3463 states and 12049 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:49,913 INFO L93 Difference]: Finished difference Result 13772 states and 44128 transitions. [2022-03-15 16:37:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:37:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:49,942 INFO L225 Difference]: With dead ends: 13772 [2022-03-15 16:37:49,942 INFO L226 Difference]: Without dead ends: 13772 [2022-03-15 16:37:49,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1770, Invalid=6602, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:37:49,943 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 656 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:49,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 267 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:37:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2022-03-15 16:37:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 4598. [2022-03-15 16:37:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.5729823798129217) internal successors, (16425), 4597 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16425 transitions. [2022-03-15 16:37:50,093 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16425 transitions. Word has length 27 [2022-03-15 16:37:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:50,093 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16425 transitions. [2022-03-15 16:37:50,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16425 transitions. [2022-03-15 16:37:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:50,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:50,100 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] [2022-03-15 16:37:50,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 16:37:50,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:37:50,301 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1100027163, now seen corresponding path program 14 times [2022-03-15 16:37:50,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:50,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418957289] [2022-03-15 16:37:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:50,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:50,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:50,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418957289] [2022-03-15 16:37:50,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418957289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:50,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431177138] [2022-03-15 16:37:50,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:50,342 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:50,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:37:50,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:50,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:50,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:50,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:50,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431177138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:50,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:50,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-15 16:37:50,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389416615] [2022-03-15 16:37:50,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:50,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:50,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:50,544 INFO L87 Difference]: Start difference. First operand 4598 states and 16425 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:51,732 INFO L93 Difference]: Finished difference Result 11895 states and 38033 transitions. [2022-03-15 16:37:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:37:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:51,756 INFO L225 Difference]: With dead ends: 11895 [2022-03-15 16:37:51,756 INFO L226 Difference]: Without dead ends: 11895 [2022-03-15 16:37:51,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:37:51,757 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 699 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:51,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 269 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11895 states. [2022-03-15 16:37:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11895 to 4597. [2022-03-15 16:37:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 3.571366405570061) internal successors, (16414), 4596 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 16414 transitions. [2022-03-15 16:37:51,891 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 16414 transitions. Word has length 27 [2022-03-15 16:37:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:51,891 INFO L470 AbstractCegarLoop]: Abstraction has 4597 states and 16414 transitions. [2022-03-15 16:37:51,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 16414 transitions. [2022-03-15 16:37:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:51,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:51,897 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] [2022-03-15 16:37:51,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:37:52,098 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,SelfDestructingSolverStorable50 [2022-03-15 16:37:52,098 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1526676838, now seen corresponding path program 15 times [2022-03-15 16:37:52,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:52,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978448805] [2022-03-15 16:37:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:52,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:52,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:52,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978448805] [2022-03-15 16:37:52,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978448805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:52,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652599690] [2022-03-15 16:37:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:37:52,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:52,126 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:52,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:37:52,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:37:52,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:52,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:52,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652599690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:52,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:52,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-15 16:37:52,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708705701] [2022-03-15 16:37:52,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:52,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:37:52,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:37:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:52,310 INFO L87 Difference]: Start difference. First operand 4597 states and 16414 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:52,513 INFO L93 Difference]: Finished difference Result 6491 states and 22125 transitions. [2022-03-15 16:37:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:37:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-03-15 16:37:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:52,526 INFO L225 Difference]: With dead ends: 6491 [2022-03-15 16:37:52,526 INFO L226 Difference]: Without dead ends: 6480 [2022-03-15 16:37:52,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:37:52,527 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 230 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:52,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 105 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2022-03-15 16:37:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 4687. [2022-03-15 16:37:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.5742637644046096) internal successors, (16749), 4686 states have internal predecessors, (16749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 16749 transitions. [2022-03-15 16:37:52,614 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 16749 transitions. Word has length 27 [2022-03-15 16:37:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:52,614 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 16749 transitions. [2022-03-15 16:37:52,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 16749 transitions. [2022-03-15 16:37:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:52,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:52,620 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] [2022-03-15 16:37:52,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 16:37:52,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:52,821 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:52,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1074696534, now seen corresponding path program 16 times [2022-03-15 16:37:52,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:52,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105073387] [2022-03-15 16:37:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:52,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:52,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:52,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105073387] [2022-03-15 16:37:52,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105073387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:52,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551318128] [2022-03-15 16:37:52,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:37:52,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:52,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:52,848 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:52,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:37:52,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:37:52,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:52,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:37:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:52,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:53,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551318128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:53,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:53,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-15 16:37:53,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127445116] [2022-03-15 16:37:53,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:53,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:37:53,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:37:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:37:53,004 INFO L87 Difference]: Start difference. First operand 4687 states and 16749 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:53,270 INFO L93 Difference]: Finished difference Result 7410 states and 24751 transitions. [2022-03-15 16:37:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:37:53,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-03-15 16:37:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:53,285 INFO L225 Difference]: With dead ends: 7410 [2022-03-15 16:37:53,285 INFO L226 Difference]: Without dead ends: 7410 [2022-03-15 16:37:53,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:37:53,286 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 262 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:53,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 156 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:37:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2022-03-15 16:37:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 4582. [2022-03-15 16:37:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.563632394673652) internal successors, (16325), 4581 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16325 transitions. [2022-03-15 16:37:53,414 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16325 transitions. Word has length 27 [2022-03-15 16:37:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:53,414 INFO L470 AbstractCegarLoop]: Abstraction has 4582 states and 16325 transitions. [2022-03-15 16:37:53,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16325 transitions. [2022-03-15 16:37:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:53,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:53,420 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] [2022-03-15 16:37:53,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 16:37:53,620 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,SelfDestructingSolverStorable52 [2022-03-15 16:37:53,621 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash 728117397, now seen corresponding path program 17 times [2022-03-15 16:37:53,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:53,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3824972] [2022-03-15 16:37:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:53,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:53,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:53,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3824972] [2022-03-15 16:37:53,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3824972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:53,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559980953] [2022-03-15 16:37:53,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:37:53,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:53,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:53,654 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:53,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:37:53,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:37:53,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:53,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:53,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559980953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:53,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:53,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-15 16:37:53,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435135414] [2022-03-15 16:37:53,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:53,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:53,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:53,846 INFO L87 Difference]: Start difference. First operand 4582 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:54,880 INFO L93 Difference]: Finished difference Result 12614 states and 40253 transitions. [2022-03-15 16:37:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:37:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:54,907 INFO L225 Difference]: With dead ends: 12614 [2022-03-15 16:37:54,907 INFO L226 Difference]: Without dead ends: 12614 [2022-03-15 16:37:54,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1276, Invalid=4730, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:37:54,908 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 549 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:54,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 215 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12614 states. [2022-03-15 16:37:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12614 to 4598. [2022-03-15 16:37:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.565151185555797) internal successors, (16389), 4597 states have internal predecessors, (16389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16389 transitions. [2022-03-15 16:37:55,064 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16389 transitions. Word has length 27 [2022-03-15 16:37:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:55,064 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16389 transitions. [2022-03-15 16:37:55,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16389 transitions. [2022-03-15 16:37:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:55,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:55,070 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] [2022-03-15 16:37:55,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 16:37:55,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:55,272 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash 538899099, now seen corresponding path program 18 times [2022-03-15 16:37:55,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:55,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102740346] [2022-03-15 16:37:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:55,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:55,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:55,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102740346] [2022-03-15 16:37:55,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102740346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:55,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768211498] [2022-03-15 16:37:55,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:37:55,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:55,303 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:55,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:37:55,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:37:55,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:55,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:37:55,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:55,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768211498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:55,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:55,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-15 16:37:55,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878302181] [2022-03-15 16:37:55,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:55,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:37:55,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:37:55,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:37:55,459 INFO L87 Difference]: Start difference. First operand 4598 states and 16389 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:56,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:56,291 INFO L93 Difference]: Finished difference Result 12094 states and 38855 transitions. [2022-03-15 16:37:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:37:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:56,315 INFO L225 Difference]: With dead ends: 12094 [2022-03-15 16:37:56,315 INFO L226 Difference]: Without dead ends: 12086 [2022-03-15 16:37:56,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=888, Invalid=3272, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:37:56,316 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 610 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:56,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 210 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-03-15 16:37:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 4592. [2022-03-15 16:37:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-03-15 16:37:56,496 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-03-15 16:37:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:56,496 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-03-15 16:37:56,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-03-15 16:37:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:56,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:56,502 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] [2022-03-15 16:37:56,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:56,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:56,703 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1928420315, now seen corresponding path program 19 times [2022-03-15 16:37:56,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:56,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023090599] [2022-03-15 16:37:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:56,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:56,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:56,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023090599] [2022-03-15 16:37:56,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023090599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:56,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840561620] [2022-03-15 16:37:56,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:37:56,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:56,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:56,734 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:56,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:37:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:56,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:56,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:56,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840561620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:56,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:56,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-15 16:37:56,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810952402] [2022-03-15 16:37:56,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:56,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:56,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:56,915 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:57,874 INFO L93 Difference]: Finished difference Result 10329 states and 32586 transitions. [2022-03-15 16:37:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:37:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:57,897 INFO L225 Difference]: With dead ends: 10329 [2022-03-15 16:37:57,897 INFO L226 Difference]: Without dead ends: 10329 [2022-03-15 16:37:57,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1236, Invalid=3876, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:37:57,898 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 843 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:57,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 244 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:37:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2022-03-15 16:37:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 4598. [2022-03-15 16:37:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.563845986512943) internal successors, (16383), 4597 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16383 transitions. [2022-03-15 16:37:58,061 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16383 transitions. Word has length 27 [2022-03-15 16:37:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:58,061 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16383 transitions. [2022-03-15 16:37:58,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16383 transitions. [2022-03-15 16:37:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:58,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:58,067 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] [2022-03-15 16:37:58,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:37:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 16:37:58,268 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:37:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:37:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -583897511, now seen corresponding path program 20 times [2022-03-15 16:37:58,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:37:58,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296154160] [2022-03-15 16:37:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:37:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:37:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:37:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:58,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:37:58,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296154160] [2022-03-15 16:37:58,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296154160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:37:58,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001553198] [2022-03-15 16:37:58,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:37:58,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:37:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:37:58,304 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:37:58,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:37:58,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:37:58,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:37:58,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:37:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:37:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:58,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:37:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:37:58,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001553198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:37:58,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:37:58,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-15 16:37:58,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037122524] [2022-03-15 16:37:58,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:37:58,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:37:58,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:37:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:37:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:37:58,482 INFO L87 Difference]: Start difference. First operand 4598 states and 16383 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:37:59,695 INFO L93 Difference]: Finished difference Result 10595 states and 33851 transitions. [2022-03-15 16:37:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 16:37:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:37:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:37:59,717 INFO L225 Difference]: With dead ends: 10595 [2022-03-15 16:37:59,717 INFO L226 Difference]: Without dead ends: 10587 [2022-03-15 16:37:59,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1514, Invalid=5968, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:37:59,718 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 743 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:37:59,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 262 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:37:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2022-03-15 16:37:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 4592. [2022-03-15 16:37:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-03-15 16:37:59,868 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-03-15 16:37:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:37:59,868 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-03-15 16:37:59,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:37:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-03-15 16:37:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:37:59,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:37:59,875 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] [2022-03-15 16:37:59,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:00,076 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,SelfDestructingSolverStorable56 [2022-03-15 16:38:00,076 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1207160328, now seen corresponding path program 21 times [2022-03-15 16:38:00,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:00,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144574757] [2022-03-15 16:38:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:00,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:00,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144574757] [2022-03-15 16:38:00,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144574757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:00,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127006231] [2022-03-15 16:38:00,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:00,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:00,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:00,108 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:00,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:38:00,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:38:00,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:38:00,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:00,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:00,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127006231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:00,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:00,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:38:00,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85395883] [2022-03-15 16:38:00,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:00,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:38:00,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:38:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:38:00,271 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:00,550 INFO L93 Difference]: Finished difference Result 7411 states and 24660 transitions. [2022-03-15 16:38:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:38:00,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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 27 [2022-03-15 16:38:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:00,566 INFO L225 Difference]: With dead ends: 7411 [2022-03-15 16:38:00,566 INFO L226 Difference]: Without dead ends: 7411 [2022-03-15 16:38:00,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:38:00,566 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:00,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 167 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:38:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2022-03-15 16:38:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 5288. [2022-03-15 16:38:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 3.5496500851144317) internal successors, (18767), 5287 states have internal predecessors, (18767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 18767 transitions. [2022-03-15 16:38:00,670 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 18767 transitions. Word has length 27 [2022-03-15 16:38:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:00,670 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 18767 transitions. [2022-03-15 16:38:00,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 18767 transitions. [2022-03-15 16:38:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:00,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:00,678 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] [2022-03-15 16:38:00,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 16:38:00,882 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,SelfDestructingSolverStorable57 [2022-03-15 16:38:00,882 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash 459370969, now seen corresponding path program 22 times [2022-03-15 16:38:00,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:00,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906187903] [2022-03-15 16:38:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:00,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:00,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906187903] [2022-03-15 16:38:00,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906187903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:00,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337082115] [2022-03-15 16:38:00,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:00,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:00,931 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:00,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:38:00,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:01,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:01,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337082115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:01,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:01,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:38:01,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104143580] [2022-03-15 16:38:01,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:01,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:38:01,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:38:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:38:01,112 INFO L87 Difference]: Start difference. First operand 5288 states and 18767 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:01,747 INFO L93 Difference]: Finished difference Result 12338 states and 40499 transitions. [2022-03-15 16:38:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:38:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 27 [2022-03-15 16:38:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:01,776 INFO L225 Difference]: With dead ends: 12338 [2022-03-15 16:38:01,776 INFO L226 Difference]: Without dead ends: 12338 [2022-03-15 16:38:01,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1950, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:38:01,777 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 484 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:01,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 160 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:38:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2022-03-15 16:38:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 6120. [2022-03-15 16:38:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 6119 states have (on average 3.566268998202321) internal successors, (21822), 6119 states have internal predecessors, (21822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 21822 transitions. [2022-03-15 16:38:01,967 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 21822 transitions. Word has length 27 [2022-03-15 16:38:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 21822 transitions. [2022-03-15 16:38:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 21822 transitions. [2022-03-15 16:38:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:01,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:01,975 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] [2022-03-15 16:38:01,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 16:38:02,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 16:38:02,187 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:02,188 INFO L85 PathProgramCache]: Analyzing trace with hash 270152671, now seen corresponding path program 23 times [2022-03-15 16:38:02,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:02,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346322275] [2022-03-15 16:38:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:02,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:02,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:02,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346322275] [2022-03-15 16:38:02,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346322275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:02,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606186216] [2022-03-15 16:38:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:02,216 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:02,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:38:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:02,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:38:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:02,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:02,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606186216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:02,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:02,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:38:02,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228772688] [2022-03-15 16:38:02,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:02,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:38:02,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:02,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:38:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:38:02,346 INFO L87 Difference]: Start difference. First operand 6120 states and 21822 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:02,881 INFO L93 Difference]: Finished difference Result 11967 states and 39549 transitions. [2022-03-15 16:38:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:38:02,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 27 [2022-03-15 16:38:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:02,906 INFO L225 Difference]: With dead ends: 11967 [2022-03-15 16:38:02,906 INFO L226 Difference]: Without dead ends: 11959 [2022-03-15 16:38:02,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=440, Invalid=1452, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:38:02,906 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 479 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:02,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 165 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:38:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2022-03-15 16:38:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 6112. [2022-03-15 16:38:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.5660284732449683) internal successors, (21792), 6111 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 21792 transitions. [2022-03-15 16:38:03,100 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 21792 transitions. Word has length 27 [2022-03-15 16:38:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:03,100 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 21792 transitions. [2022-03-15 16:38:03,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 21792 transitions. [2022-03-15 16:38:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:03,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:03,108 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, 1, 1, 1] [2022-03-15 16:38:03,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-15 16:38:03,308 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,SelfDestructingSolverStorable59 [2022-03-15 16:38:03,308 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash -941485803, now seen corresponding path program 9 times [2022-03-15 16:38:03,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:03,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684441262] [2022-03-15 16:38:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:03,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:03,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:03,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684441262] [2022-03-15 16:38:03,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684441262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:03,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136054371] [2022-03-15 16:38:03,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:03,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:03,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:03,344 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:03,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:38:03,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:38:03,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:03,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:38:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:03,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:03,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136054371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:03,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:03,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-03-15 16:38:03,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533118997] [2022-03-15 16:38:03,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:03,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:38:03,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:03,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:38:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:38:03,480 INFO L87 Difference]: Start difference. First operand 6112 states and 21792 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:03,688 INFO L93 Difference]: Finished difference Result 7455 states and 25610 transitions. [2022-03-15 16:38:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:38:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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 27 [2022-03-15 16:38:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:03,705 INFO L225 Difference]: With dead ends: 7455 [2022-03-15 16:38:03,705 INFO L226 Difference]: Without dead ends: 7455 [2022-03-15 16:38:03,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:38:03,705 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:03,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 102 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:38:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2022-03-15 16:38:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 6153. [2022-03-15 16:38:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 3.5640442132639794) internal successors, (21926), 6152 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 21926 transitions. [2022-03-15 16:38:03,818 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 21926 transitions. Word has length 27 [2022-03-15 16:38:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:03,818 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 21926 transitions. [2022-03-15 16:38:03,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 21926 transitions. [2022-03-15 16:38:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:03,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:03,827 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] [2022-03-15 16:38:03,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:04,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:04,038 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash 913534931, now seen corresponding path program 24 times [2022-03-15 16:38:04,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:04,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989599452] [2022-03-15 16:38:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:04,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:04,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989599452] [2022-03-15 16:38:04,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989599452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:04,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339199454] [2022-03-15 16:38:04,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:04,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:04,069 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:04,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:38:04,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:38:04,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:04,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:04,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:04,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339199454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:04,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:04,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:38:04,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712549647] [2022-03-15 16:38:04,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:38:04,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:38:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:38:04,219 INFO L87 Difference]: Start difference. First operand 6153 states and 21926 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:04,689 INFO L93 Difference]: Finished difference Result 11867 states and 39346 transitions. [2022-03-15 16:38:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:38:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 27 [2022-03-15 16:38:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:04,714 INFO L225 Difference]: With dead ends: 11867 [2022-03-15 16:38:04,714 INFO L226 Difference]: Without dead ends: 11835 [2022-03-15 16:38:04,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:38:04,715 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 553 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:04,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 120 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:38:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-03-15 16:38:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 6181. [2022-03-15 16:38:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 3.5611650485436894) internal successors, (22008), 6180 states have internal predecessors, (22008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 22008 transitions. [2022-03-15 16:38:04,895 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 22008 transitions. Word has length 27 [2022-03-15 16:38:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:04,895 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 22008 transitions. [2022-03-15 16:38:04,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 22008 transitions. [2022-03-15 16:38:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:04,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:04,905 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] [2022-03-15 16:38:04,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 16:38:05,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:05,105 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:05,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:05,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1225890903, now seen corresponding path program 25 times [2022-03-15 16:38:05,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:05,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421848859] [2022-03-15 16:38:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:05,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:05,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421848859] [2022-03-15 16:38:05,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421848859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:05,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086266630] [2022-03-15 16:38:05,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:05,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:05,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:05,139 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:05,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:38:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:05,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:05,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:05,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086266630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:05,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:05,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:38:05,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311488811] [2022-03-15 16:38:05,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:05,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:38:05,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:38:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:38:05,335 INFO L87 Difference]: Start difference. First operand 6181 states and 22008 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:06,581 INFO L93 Difference]: Finished difference Result 11509 states and 36905 transitions. [2022-03-15 16:38:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 16:38:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:38:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:06,638 INFO L225 Difference]: With dead ends: 11509 [2022-03-15 16:38:06,638 INFO L226 Difference]: Without dead ends: 11509 [2022-03-15 16:38:06,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1502, Invalid=5808, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:38:06,639 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 779 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:06,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 343 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:38:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2022-03-15 16:38:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 6427. [2022-03-15 16:38:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 3.541083099906629) internal successors, (22755), 6426 states have internal predecessors, (22755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 22755 transitions. [2022-03-15 16:38:06,825 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 22755 transitions. Word has length 27 [2022-03-15 16:38:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:06,825 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 22755 transitions. [2022-03-15 16:38:06,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 22755 transitions. [2022-03-15 16:38:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:06,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:06,833 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] [2022-03-15 16:38:06,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:07,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:07,040 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:07,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1286426923, now seen corresponding path program 26 times [2022-03-15 16:38:07,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:07,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752760775] [2022-03-15 16:38:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:07,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:07,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752760775] [2022-03-15 16:38:07,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752760775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:07,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286048500] [2022-03-15 16:38:07,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:07,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:07,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:07,072 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:07,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:38:07,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:07,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:07,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286048500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:07,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:07,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:38:07,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298379302] [2022-03-15 16:38:07,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:07,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:38:07,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:38:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:38:07,259 INFO L87 Difference]: Start difference. First operand 6427 states and 22755 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:08,497 INFO L93 Difference]: Finished difference Result 11437 states and 37488 transitions. [2022-03-15 16:38:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 16:38:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:38:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:08,522 INFO L225 Difference]: With dead ends: 11437 [2022-03-15 16:38:08,522 INFO L226 Difference]: Without dead ends: 11429 [2022-03-15 16:38:08,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1456, Invalid=6200, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:38:08,523 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 789 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:08,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 241 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:38:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2022-03-15 16:38:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 6417. [2022-03-15 16:38:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6416 states have (on average 3.5395885286783044) internal successors, (22710), 6416 states have internal predecessors, (22710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 22710 transitions. [2022-03-15 16:38:08,715 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 22710 transitions. Word has length 27 [2022-03-15 16:38:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 6417 states and 22710 transitions. [2022-03-15 16:38:08,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 22710 transitions. [2022-03-15 16:38:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:08,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:08,723 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] [2022-03-15 16:38:08,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 16:38:08,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:08,924 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2131398375, now seen corresponding path program 27 times [2022-03-15 16:38:08,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:08,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562898510] [2022-03-15 16:38:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:08,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:08,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562898510] [2022-03-15 16:38:08,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562898510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:08,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321889565] [2022-03-15 16:38:08,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:38:08,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:08,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:08,956 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:08,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:38:08,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:38:08,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:08,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:08,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:09,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:09,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321889565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:09,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:09,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:38:09,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049484487] [2022-03-15 16:38:09,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:09,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:38:09,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:38:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:38:09,125 INFO L87 Difference]: Start difference. First operand 6417 states and 22710 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:10,068 INFO L93 Difference]: Finished difference Result 10978 states and 36562 transitions. [2022-03-15 16:38:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:38:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 27 [2022-03-15 16:38:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:10,092 INFO L225 Difference]: With dead ends: 10978 [2022-03-15 16:38:10,092 INFO L226 Difference]: Without dead ends: 10946 [2022-03-15 16:38:10,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=932, Invalid=3624, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:38:10,093 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 626 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:10,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 210 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:38:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10946 states. [2022-03-15 16:38:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10946 to 6457. [2022-03-15 16:38:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6457 states, 6456 states have (on average 3.5353159851301115) internal successors, (22824), 6456 states have internal predecessors, (22824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6457 states to 6457 states and 22824 transitions. [2022-03-15 16:38:10,248 INFO L78 Accepts]: Start accepts. Automaton has 6457 states and 22824 transitions. Word has length 27 [2022-03-15 16:38:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:10,249 INFO L470 AbstractCegarLoop]: Abstraction has 6457 states and 22824 transitions. [2022-03-15 16:38:10,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6457 states and 22824 transitions. [2022-03-15 16:38:10,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:10,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:10,257 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] [2022-03-15 16:38:10,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 16:38:10,457 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,SelfDestructingSolverStorable64 [2022-03-15 16:38:10,458 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:10,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1828165507, now seen corresponding path program 28 times [2022-03-15 16:38:10,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:10,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169495291] [2022-03-15 16:38:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:10,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:10,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169495291] [2022-03-15 16:38:10,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169495291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:10,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881486127] [2022-03-15 16:38:10,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:10,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:10,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:10,500 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:10,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:38:10,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:10,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:10,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:10,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881486127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:10,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:10,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:38:10,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818356999] [2022-03-15 16:38:10,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:10,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:38:10,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:38:10,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:38:10,699 INFO L87 Difference]: Start difference. First operand 6457 states and 22824 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:11,292 INFO L93 Difference]: Finished difference Result 9242 states and 30901 transitions. [2022-03-15 16:38:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:38:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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 27 [2022-03-15 16:38:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:11,310 INFO L225 Difference]: With dead ends: 9242 [2022-03-15 16:38:11,310 INFO L226 Difference]: Without dead ends: 9242 [2022-03-15 16:38:11,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:38:11,315 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 310 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:11,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 196 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:38:11,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-03-15 16:38:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 6587. [2022-03-15 16:38:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 3.5252049802611602) internal successors, (23217), 6586 states have internal predecessors, (23217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 23217 transitions. [2022-03-15 16:38:11,448 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 23217 transitions. Word has length 27 [2022-03-15 16:38:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:11,448 INFO L470 AbstractCegarLoop]: Abstraction has 6587 states and 23217 transitions. [2022-03-15 16:38:11,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 23217 transitions. [2022-03-15 16:38:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:11,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:11,457 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] [2022-03-15 16:38:11,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 16:38:11,657 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,SelfDestructingSolverStorable65 [2022-03-15 16:38:11,658 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1881628206, now seen corresponding path program 18 times [2022-03-15 16:38:11,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:11,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542242205] [2022-03-15 16:38:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:11,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:11,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542242205] [2022-03-15 16:38:11,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542242205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:11,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378508597] [2022-03-15 16:38:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:11,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:11,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:11,693 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:11,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:38:11,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:38:11,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:11,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:11,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:11,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378508597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:11,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:11,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:38:11,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848975863] [2022-03-15 16:38:11,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:11,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:38:11,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:38:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:38:11,829 INFO L87 Difference]: Start difference. First operand 6587 states and 23217 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:12,217 INFO L93 Difference]: Finished difference Result 11132 states and 37515 transitions. [2022-03-15 16:38:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:38:12,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-03-15 16:38:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:12,240 INFO L225 Difference]: With dead ends: 11132 [2022-03-15 16:38:12,240 INFO L226 Difference]: Without dead ends: 11132 [2022-03-15 16:38:12,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:38:12,241 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:12,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 131 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:38:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2022-03-15 16:38:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 6717. [2022-03-15 16:38:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 6716 states have (on average 3.5132519356759975) internal successors, (23595), 6716 states have internal predecessors, (23595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 23595 transitions. [2022-03-15 16:38:12,402 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 23595 transitions. Word has length 27 [2022-03-15 16:38:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:12,402 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 23595 transitions. [2022-03-15 16:38:12,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 23595 transitions. [2022-03-15 16:38:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:12,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:12,411 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] [2022-03-15 16:38:12,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 16:38:12,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 16:38:12,612 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2088141458, now seen corresponding path program 19 times [2022-03-15 16:38:12,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:12,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584595102] [2022-03-15 16:38:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:12,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:12,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584595102] [2022-03-15 16:38:12,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584595102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:12,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968377957] [2022-03-15 16:38:12,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:12,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:12,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:12,648 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:12,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:38:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:12,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:12,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:12,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:38:12,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968377957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:12,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:12,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 16:38:12,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726756433] [2022-03-15 16:38:12,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:12,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:38:12,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:38:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:38:12,818 INFO L87 Difference]: Start difference. First operand 6717 states and 23595 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:13,103 INFO L93 Difference]: Finished difference Result 9155 states and 31004 transitions. [2022-03-15 16:38:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:38:13,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 27 [2022-03-15 16:38:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:13,122 INFO L225 Difference]: With dead ends: 9155 [2022-03-15 16:38:13,122 INFO L226 Difference]: Without dead ends: 9145 [2022-03-15 16:38:13,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:38:13,123 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 199 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:13,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 254 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:38:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2022-03-15 16:38:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 6962. [2022-03-15 16:38:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.5207585117080877) internal successors, (24508), 6961 states have internal predecessors, (24508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 24508 transitions. [2022-03-15 16:38:13,263 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 24508 transitions. Word has length 27 [2022-03-15 16:38:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:13,263 INFO L470 AbstractCegarLoop]: Abstraction has 6962 states and 24508 transitions. [2022-03-15 16:38:13,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 24508 transitions. [2022-03-15 16:38:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:13,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:13,273 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] [2022-03-15 16:38:13,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 16:38:13,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:13,488 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1818737390, now seen corresponding path program 20 times [2022-03-15 16:38:13,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:13,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735320938] [2022-03-15 16:38:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:13,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:13,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:13,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735320938] [2022-03-15 16:38:13,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735320938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:13,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520577817] [2022-03-15 16:38:13,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:13,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:13,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:13,522 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:13,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:38:13,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:13,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:38:13,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:13,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:13,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520577817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:13,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:13,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:38:13,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208727724] [2022-03-15 16:38:13,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:13,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:38:13,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:38:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:38:13,644 INFO L87 Difference]: Start difference. First operand 6962 states and 24508 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:13,988 INFO L93 Difference]: Finished difference Result 11751 states and 39739 transitions. [2022-03-15 16:38:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:38:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-03-15 16:38:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:14,013 INFO L225 Difference]: With dead ends: 11751 [2022-03-15 16:38:14,013 INFO L226 Difference]: Without dead ends: 11735 [2022-03-15 16:38:14,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:38:14,013 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 289 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:14,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 137 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:38:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11735 states. [2022-03-15 16:38:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11735 to 7106. [2022-03-15 16:38:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7106 states, 7105 states have (on average 3.5073891625615765) internal successors, (24920), 7105 states have internal predecessors, (24920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 24920 transitions. [2022-03-15 16:38:14,172 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 24920 transitions. Word has length 27 [2022-03-15 16:38:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:14,172 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 24920 transitions. [2022-03-15 16:38:14,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 24920 transitions. [2022-03-15 16:38:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:38:14,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:14,182 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, 1, 1, 1] [2022-03-15 16:38:14,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 16:38:14,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:14,383 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1104222989, now seen corresponding path program 10 times [2022-03-15 16:38:14,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:14,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132373991] [2022-03-15 16:38:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:14,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:14,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132373991] [2022-03-15 16:38:14,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132373991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:14,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374648150] [2022-03-15 16:38:14,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:38:14,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:14,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:14,425 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:14,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:38:14,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:38:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:38:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:14,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:14,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374648150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:14,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:14,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 16:38:14,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020169581] [2022-03-15 16:38:14,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:14,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:38:14,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:38:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:38:14,590 INFO L87 Difference]: Start difference. First operand 7106 states and 24920 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:14,895 INFO L93 Difference]: Finished difference Result 8555 states and 28945 transitions. [2022-03-15 16:38:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:38:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2022-03-15 16:38:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:14,912 INFO L225 Difference]: With dead ends: 8555 [2022-03-15 16:38:14,912 INFO L226 Difference]: Without dead ends: 8555 [2022-03-15 16:38:14,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:38:14,912 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 171 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:14,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 111 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:38:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2022-03-15 16:38:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 7022. [2022-03-15 16:38:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 7021 states have (on average 3.5060532687651333) internal successors, (24616), 7021 states have internal predecessors, (24616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 24616 transitions. [2022-03-15 16:38:15,043 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 24616 transitions. Word has length 27 [2022-03-15 16:38:15,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:15,043 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 24616 transitions. [2022-03-15 16:38:15,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 24616 transitions. [2022-03-15 16:38:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:15,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:15,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:15,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-15 16:38:15,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:38:15,255 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1885222371, now seen corresponding path program 29 times [2022-03-15 16:38:15,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:15,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146952341] [2022-03-15 16:38:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:15,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:15,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146952341] [2022-03-15 16:38:15,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146952341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:15,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757648914] [2022-03-15 16:38:15,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:15,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:15,385 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:15,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:38:15,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:38:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:15,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:38:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:15,581 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 28 treesize of output 16 [2022-03-15 16:38:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:15,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:15,771 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:38:15,772 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 21 treesize of output 46 [2022-03-15 16:38:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:15,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:15,834 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 21 treesize of output 3 [2022-03-15 16:38:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:15,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757648914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:15,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:15,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-03-15 16:38:15,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940633142] [2022-03-15 16:38:15,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:15,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:38:15,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:38:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:38:15,864 INFO L87 Difference]: Start difference. First operand 7022 states and 24616 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) [2022-03-15 16:38:16,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:16,107 INFO L93 Difference]: Finished difference Result 7838 states and 27083 transitions. [2022-03-15 16:38:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:38:16,107 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 30 [2022-03-15 16:38:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:16,123 INFO L225 Difference]: With dead ends: 7838 [2022-03-15 16:38:16,123 INFO L226 Difference]: Without dead ends: 7769 [2022-03-15 16:38:16,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:38:16,123 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 121 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:16,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 371 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:38:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7769 states. [2022-03-15 16:38:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7769 to 7214. [2022-03-15 16:38:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7214 states, 7213 states have (on average 3.501178427838625) internal successors, (25254), 7213 states have internal predecessors, (25254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 25254 transitions. [2022-03-15 16:38:16,245 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 25254 transitions. Word has length 30 [2022-03-15 16:38:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:16,245 INFO L470 AbstractCegarLoop]: Abstraction has 7214 states and 25254 transitions. [2022-03-15 16:38:16,245 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) [2022-03-15 16:38:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 25254 transitions. [2022-03-15 16:38:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:16,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:16,256 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] [2022-03-15 16:38:16,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 16:38:16,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:16,457 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash -428025768, now seen corresponding path program 11 times [2022-03-15 16:38:16,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:16,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040696668] [2022-03-15 16:38:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:16,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:16,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:16,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040696668] [2022-03-15 16:38:16,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040696668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:16,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681175524] [2022-03-15 16:38:16,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:38:16,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:16,750 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:16,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:38:16,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:38:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:38:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:17,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:17,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:17,090 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 33 treesize of output 21 [2022-03-15 16:38:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:17,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:17,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:17,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:17,409 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 19 treesize of output 54 [2022-03-15 16:38:17,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:17,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:17,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:17,560 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 19 treesize of output 46 [2022-03-15 16:38:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:17,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681175524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:17,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:17,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:38:17,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366978346] [2022-03-15 16:38:17,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:17,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:38:17,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:17,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:38:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:38:17,755 INFO L87 Difference]: Start difference. First operand 7214 states and 25254 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:24,357 INFO L93 Difference]: Finished difference Result 12273 states and 38840 transitions. [2022-03-15 16:38:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 16:38:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:38:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:24,383 INFO L225 Difference]: With dead ends: 12273 [2022-03-15 16:38:24,383 INFO L226 Difference]: Without dead ends: 12228 [2022-03-15 16:38:24,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2071, Invalid=13181, Unknown=0, NotChecked=0, Total=15252 [2022-03-15 16:38:24,385 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 824 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:24,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 767 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:38:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12228 states. [2022-03-15 16:38:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12228 to 7230. [2022-03-15 16:38:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.5000691658597316) internal successors, (25302), 7229 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 25302 transitions. [2022-03-15 16:38:24,566 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 25302 transitions. Word has length 30 [2022-03-15 16:38:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:24,566 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 25302 transitions. [2022-03-15 16:38:24,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 25302 transitions. [2022-03-15 16:38:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:24,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:24,577 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] [2022-03-15 16:38:24,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 16:38:24,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:24,778 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 999153544, now seen corresponding path program 12 times [2022-03-15 16:38:24,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:24,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571504652] [2022-03-15 16:38:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:25,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:25,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571504652] [2022-03-15 16:38:25,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571504652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:25,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708326493] [2022-03-15 16:38:25,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:38:25,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:25,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:25,040 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:38:25,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:38:25,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:38:25,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:25,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:25,402 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-03-15 16:38:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:26,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:26,035 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 19 treesize of output 46 [2022-03-15 16:38:26,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:26,072 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 20 treesize of output 5 [2022-03-15 16:38:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:26,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708326493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:26,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:26,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-15 16:38:26,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124015325] [2022-03-15 16:38:26,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:26,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:38:26,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:38:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:38:26,173 INFO L87 Difference]: Start difference. First operand 7230 states and 25302 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-03-15 16:38:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:47,182 INFO L93 Difference]: Finished difference Result 14121 states and 45782 transitions. [2022-03-15 16:38:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-03-15 16:38:47,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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 30 [2022-03-15 16:38:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:47,213 INFO L225 Difference]: With dead ends: 14121 [2022-03-15 16:38:47,213 INFO L226 Difference]: Without dead ends: 14080 [2022-03-15 16:38:47,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27018 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=6199, Invalid=61141, Unknown=0, NotChecked=0, Total=67340 [2022-03-15 16:38:47,216 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1291 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 5543 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 6104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 5543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:47,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 1092 Invalid, 6104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 5543 Invalid, 0 Unknown, 172 Unchecked, 2.8s Time] [2022-03-15 16:38:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14080 states. [2022-03-15 16:38:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14080 to 7421. [2022-03-15 16:38:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7421 states, 7420 states have (on average 3.494070080862534) internal successors, (25926), 7420 states have internal predecessors, (25926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 25926 transitions. [2022-03-15 16:38:47,431 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 25926 transitions. Word has length 30 [2022-03-15 16:38:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:47,431 INFO L470 AbstractCegarLoop]: Abstraction has 7421 states and 25926 transitions. [2022-03-15 16:38:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-03-15 16:38:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 25926 transitions. [2022-03-15 16:38:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:47,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:47,442 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] [2022-03-15 16:38:47,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 16:38:47,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-15 16:38:47,642 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:47,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1036021596, now seen corresponding path program 13 times [2022-03-15 16:38:47,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:47,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698494243] [2022-03-15 16:38:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:47,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:47,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:47,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698494243] [2022-03-15 16:38:47,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698494243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:47,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120158997] [2022-03-15 16:38:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:38:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:47,928 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:47,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:38:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:38:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:48,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,262 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 19 treesize of output 11 [2022-03-15 16:38:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:48,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:48,577 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 19 treesize of output 54 [2022-03-15 16:38:48,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:48,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:48,693 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 19 treesize of output 46 [2022-03-15 16:38:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:48,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120158997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:48,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:48,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-15 16:38:48,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615054767] [2022-03-15 16:38:48,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:48,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:38:48,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:38:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:38:48,869 INFO L87 Difference]: Start difference. First operand 7421 states and 25926 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:38:54,092 INFO L93 Difference]: Finished difference Result 12007 states and 38257 transitions. [2022-03-15 16:38:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:38:54,093 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:38:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:38:54,117 INFO L225 Difference]: With dead ends: 12007 [2022-03-15 16:38:54,117 INFO L226 Difference]: Without dead ends: 12004 [2022-03-15 16:38:54,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1850, Invalid=11260, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:38:54,119 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 793 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:38:54,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 561 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:38:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2022-03-15 16:38:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 7411. [2022-03-15 16:38:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.494871794871795) internal successors, (25897), 7410 states have internal predecessors, (25897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25897 transitions. [2022-03-15 16:38:54,325 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25897 transitions. Word has length 30 [2022-03-15 16:38:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:38:54,325 INFO L470 AbstractCegarLoop]: Abstraction has 7411 states and 25897 transitions. [2022-03-15 16:38:54,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25897 transitions. [2022-03-15 16:38:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:38:54,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:54,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:54,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 16:38:54,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:54,536 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1895398836, now seen corresponding path program 14 times [2022-03-15 16:38:54,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:54,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861452248] [2022-03-15 16:38:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:38:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:38:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:54,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:38:54,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861452248] [2022-03-15 16:38:54,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861452248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:38:54,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225342756] [2022-03-15 16:38:54,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:38:54,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:38:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:54,789 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:38:54,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:38:54,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:38:54,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:38:54,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:38:54,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:38:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:38:55,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:55,045 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:38:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:55,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:38:55,416 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:38:55,417 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 19 treesize of output 54 [2022-03-15 16:38:55,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:55,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:38:55,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:38:55,581 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 20 treesize of output 47 [2022-03-15 16:38:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:38:55,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225342756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:38:55,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:38:55,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-15 16:38:55,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444696338] [2022-03-15 16:38:55,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:38:55,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:38:55,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:38:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:38:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:38:55,744 INFO L87 Difference]: Start difference. First operand 7411 states and 25897 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-03-15 16:39:01,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:01,468 INFO L93 Difference]: Finished difference Result 12598 states and 40741 transitions. [2022-03-15 16:39:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 16:39:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 30 [2022-03-15 16:39:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:01,497 INFO L225 Difference]: With dead ends: 12598 [2022-03-15 16:39:01,497 INFO L226 Difference]: Without dead ends: 12439 [2022-03-15 16:39:01,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1366, Invalid=11516, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 16:39:01,498 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 677 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 3783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:01,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 876 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3011 Invalid, 0 Unknown, 616 Unchecked, 1.4s Time] [2022-03-15 16:39:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12439 states. [2022-03-15 16:39:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12439 to 7481. [2022-03-15 16:39:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7481 states, 7480 states have (on average 3.4958556149732622) internal successors, (26149), 7480 states have internal predecessors, (26149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 26149 transitions. [2022-03-15 16:39:01,698 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 26149 transitions. Word has length 30 [2022-03-15 16:39:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:01,698 INFO L470 AbstractCegarLoop]: Abstraction has 7481 states and 26149 transitions. [2022-03-15 16:39:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-03-15 16:39:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 26149 transitions. [2022-03-15 16:39:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:01,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:01,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:01,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:01,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-15 16:39:01,910 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash 491925475, now seen corresponding path program 21 times [2022-03-15 16:39:01,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:01,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966269788] [2022-03-15 16:39:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:01,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:02,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:02,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966269788] [2022-03-15 16:39:02,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966269788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:02,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945681512] [2022-03-15 16:39:02,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:02,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:02,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:02,277 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:02,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:39:02,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:39:02,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:39:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:02,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:02,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,635 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 25 treesize of output 15 [2022-03-15 16:39:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:02,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:02,959 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 21 treesize of output 40 [2022-03-15 16:39:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:02,981 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 22 treesize of output 5 [2022-03-15 16:39:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:03,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945681512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:03,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:03,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2022-03-15 16:39:03,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828887596] [2022-03-15 16:39:03,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:03,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:39:03,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:39:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:39:03,058 INFO L87 Difference]: Start difference. First operand 7481 states and 26149 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:11,916 INFO L93 Difference]: Finished difference Result 12701 states and 41359 transitions. [2022-03-15 16:39:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-15 16:39:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:39:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:11,941 INFO L225 Difference]: With dead ends: 12701 [2022-03-15 16:39:11,941 INFO L226 Difference]: Without dead ends: 12654 [2022-03-15 16:39:11,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9434 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2795, Invalid=23611, Unknown=0, NotChecked=0, Total=26406 [2022-03-15 16:39:11,942 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 972 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 4553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:11,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 1095 Invalid, 4553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:39:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12654 states. [2022-03-15 16:39:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12654 to 7785. [2022-03-15 16:39:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7785 states, 7784 states have (on average 3.4771325796505654) internal successors, (27066), 7784 states have internal predecessors, (27066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 27066 transitions. [2022-03-15 16:39:12,115 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 27066 transitions. Word has length 30 [2022-03-15 16:39:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:12,116 INFO L470 AbstractCegarLoop]: Abstraction has 7785 states and 27066 transitions. [2022-03-15 16:39:12,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 27066 transitions. [2022-03-15 16:39:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:12,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:12,128 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] [2022-03-15 16:39:12,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:12,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 16:39:12,328 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:12,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2120239378, now seen corresponding path program 15 times [2022-03-15 16:39:12,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:12,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305082461] [2022-03-15 16:39:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:12,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:12,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:12,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305082461] [2022-03-15 16:39:12,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305082461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:12,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61322228] [2022-03-15 16:39:12,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:12,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:12,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:12,604 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:12,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:39:12,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:39:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:39:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:13,008 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 29 treesize of output 21 [2022-03-15 16:39:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:13,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:13,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:13,390 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 35 treesize of output 68 [2022-03-15 16:39:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:13,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61322228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:13,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:13,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-15 16:39:13,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347343925] [2022-03-15 16:39:13,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:13,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:39:13,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:13,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:39:13,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:13,932 INFO L87 Difference]: Start difference. First operand 7785 states and 27066 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:17,835 INFO L93 Difference]: Finished difference Result 12241 states and 39290 transitions. [2022-03-15 16:39:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 16:39:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:39:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:17,858 INFO L225 Difference]: With dead ends: 12241 [2022-03-15 16:39:17,858 INFO L226 Difference]: Without dead ends: 12223 [2022-03-15 16:39:17,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1561, Invalid=9151, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 16:39:17,858 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 592 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 967 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:17,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 453 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1085 Invalid, 0 Unknown, 967 Unchecked, 0.6s Time] [2022-03-15 16:39:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12223 states. [2022-03-15 16:39:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12223 to 7791. [2022-03-15 16:39:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.477535301668806) internal successors, (27090), 7790 states have internal predecessors, (27090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 27090 transitions. [2022-03-15 16:39:18,023 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 27090 transitions. Word has length 30 [2022-03-15 16:39:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:18,024 INFO L470 AbstractCegarLoop]: Abstraction has 7791 states and 27090 transitions. [2022-03-15 16:39:18,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 27090 transitions. [2022-03-15 16:39:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:18,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:18,035 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] [2022-03-15 16:39:18,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 16:39:18,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:18,236 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash 680823678, now seen corresponding path program 16 times [2022-03-15 16:39:18,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:18,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567346035] [2022-03-15 16:39:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:18,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:18,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567346035] [2022-03-15 16:39:18,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567346035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:18,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175112231] [2022-03-15 16:39:18,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:18,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:18,494 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:18,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:39:18,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:39:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:18,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:18,795 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 26 treesize of output 18 [2022-03-15 16:39:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:19,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:19,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:19,108 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 19 treesize of output 54 [2022-03-15 16:39:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:19,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:19,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:19,271 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 20 treesize of output 47 [2022-03-15 16:39:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:19,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175112231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:19,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:19,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:39:19,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229547543] [2022-03-15 16:39:19,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:39:19,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:19,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:39:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:19,451 INFO L87 Difference]: Start difference. First operand 7791 states and 27090 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:25,627 INFO L93 Difference]: Finished difference Result 13671 states and 42804 transitions. [2022-03-15 16:39:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-15 16:39:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:39:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:25,657 INFO L225 Difference]: With dead ends: 13671 [2022-03-15 16:39:25,657 INFO L226 Difference]: Without dead ends: 13626 [2022-03-15 16:39:25,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6376 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2443, Invalid=14327, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 16:39:25,659 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1008 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:25,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 700 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2356 Invalid, 0 Unknown, 197 Unchecked, 1.2s Time] [2022-03-15 16:39:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13626 states. [2022-03-15 16:39:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13626 to 7812. [2022-03-15 16:39:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7812 states, 7811 states have (on average 3.4771476123415694) internal successors, (27160), 7811 states have internal predecessors, (27160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 27160 transitions. [2022-03-15 16:39:25,848 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 27160 transitions. Word has length 30 [2022-03-15 16:39:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:25,848 INFO L470 AbstractCegarLoop]: Abstraction has 7812 states and 27160 transitions. [2022-03-15 16:39:25,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 27160 transitions. [2022-03-15 16:39:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:25,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:25,860 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] [2022-03-15 16:39:25,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 16:39:26,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:26,093 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash 550383676, now seen corresponding path program 17 times [2022-03-15 16:39:26,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:26,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603491230] [2022-03-15 16:39:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:26,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:26,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603491230] [2022-03-15 16:39:26,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603491230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:26,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613832911] [2022-03-15 16:39:26,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:26,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:26,372 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:26,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:39:26,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:39:26,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:39:26,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:26,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:26,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:26,704 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 19 treesize of output 11 [2022-03-15 16:39:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:26,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:27,018 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:39:27,018 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 19 treesize of output 54 [2022-03-15 16:39:27,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:27,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:27,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:27,167 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 19 treesize of output 46 [2022-03-15 16:39:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:27,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613832911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:27,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:27,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-15 16:39:27,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645047287] [2022-03-15 16:39:27,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:27,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:39:27,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:39:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:39:27,319 INFO L87 Difference]: Start difference. First operand 7812 states and 27160 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 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) [2022-03-15 16:39:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:32,943 INFO L93 Difference]: Finished difference Result 12966 states and 41867 transitions. [2022-03-15 16:39:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 16:39:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 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 30 [2022-03-15 16:39:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:32,971 INFO L225 Difference]: With dead ends: 12966 [2022-03-15 16:39:32,972 INFO L226 Difference]: Without dead ends: 12921 [2022-03-15 16:39:32,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4117 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1195, Invalid=11015, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 16:39:32,973 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 574 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:32,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 799 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:39:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2022-03-15 16:39:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 7830. [2022-03-15 16:39:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7830 states, 7829 states have (on average 3.4775833439775194) internal successors, (27226), 7829 states have internal predecessors, (27226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 27226 transitions. [2022-03-15 16:39:33,169 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 27226 transitions. Word has length 30 [2022-03-15 16:39:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:33,169 INFO L470 AbstractCegarLoop]: Abstraction has 7830 states and 27226 transitions. [2022-03-15 16:39:33,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 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) [2022-03-15 16:39:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 27226 transitions. [2022-03-15 16:39:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:33,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:33,181 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] [2022-03-15 16:39:33,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 16:39:33,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:39:33,381 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash -168495444, now seen corresponding path program 18 times [2022-03-15 16:39:33,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:33,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872407155] [2022-03-15 16:39:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:33,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:33,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:33,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872407155] [2022-03-15 16:39:33,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872407155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:33,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773001672] [2022-03-15 16:39:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:33,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:33,658 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:33,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:39:33,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:39:33,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:39:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:33,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:33,905 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 16:39:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:33,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:34,274 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:39:34,275 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 19 treesize of output 54 [2022-03-15 16:39:34,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:34,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:34,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:34,414 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 20 treesize of output 47 [2022-03-15 16:39:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:34,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773001672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:34,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:34,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-15 16:39:34,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474183491] [2022-03-15 16:39:34,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:34,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:39:34,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:34,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:39:34,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:39:34,606 INFO L87 Difference]: Start difference. First operand 7830 states and 27226 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-03-15 16:39:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:42,081 INFO L93 Difference]: Finished difference Result 14476 states and 46100 transitions. [2022-03-15 16:39:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-15 16:39:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 30 [2022-03-15 16:39:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:42,112 INFO L225 Difference]: With dead ends: 14476 [2022-03-15 16:39:42,112 INFO L226 Difference]: Without dead ends: 14343 [2022-03-15 16:39:42,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1887, Invalid=16473, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 16:39:42,114 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 902 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 4562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:42,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 1235 Invalid, 4562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3929 Invalid, 0 Unknown, 437 Unchecked, 1.8s Time] [2022-03-15 16:39:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2022-03-15 16:39:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 7848. [2022-03-15 16:39:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.4794188861985473) internal successors, (27303), 7847 states have internal predecessors, (27303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 27303 transitions. [2022-03-15 16:39:42,331 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 27303 transitions. Word has length 30 [2022-03-15 16:39:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:42,331 INFO L470 AbstractCegarLoop]: Abstraction has 7848 states and 27303 transitions. [2022-03-15 16:39:42,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-03-15 16:39:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 27303 transitions. [2022-03-15 16:39:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:42,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:42,343 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] [2022-03-15 16:39:42,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 16:39:42,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 16:39:42,544 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash -815268852, now seen corresponding path program 19 times [2022-03-15 16:39:42,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:42,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003948084] [2022-03-15 16:39:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:42,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:42,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:42,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003948084] [2022-03-15 16:39:42,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003948084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:42,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257115966] [2022-03-15 16:39:42,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:42,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:42,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:42,794 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:42,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:39:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:39:42,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:43,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:43,095 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 24 treesize of output 16 [2022-03-15 16:39:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:43,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:43,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:43,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:43,405 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 19 treesize of output 54 [2022-03-15 16:39:43,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:43,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:43,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:43,545 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 19 treesize of output 46 [2022-03-15 16:39:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:43,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257115966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:43,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:43,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-15 16:39:43,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448639513] [2022-03-15 16:39:43,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:43,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:39:43,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:39:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:39:43,731 INFO L87 Difference]: Start difference. First operand 7848 states and 27303 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-03-15 16:39:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:49,691 INFO L93 Difference]: Finished difference Result 12337 states and 39312 transitions. [2022-03-15 16:39:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 16:39:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 30 [2022-03-15 16:39:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:49,719 INFO L225 Difference]: With dead ends: 12337 [2022-03-15 16:39:49,719 INFO L226 Difference]: Without dead ends: 12292 [2022-03-15 16:39:49,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4815 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1642, Invalid=11930, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 16:39:49,720 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 855 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:49,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 716 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2974 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:39:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12292 states. [2022-03-15 16:39:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12292 to 7843. [2022-03-15 16:39:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7843 states, 7842 states have (on average 3.479597041571028) internal successors, (27287), 7842 states have internal predecessors, (27287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7843 states to 7843 states and 27287 transitions. [2022-03-15 16:39:49,905 INFO L78 Accepts]: Start accepts. Automaton has 7843 states and 27287 transitions. Word has length 30 [2022-03-15 16:39:49,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:49,905 INFO L470 AbstractCegarLoop]: Abstraction has 7843 states and 27287 transitions. [2022-03-15 16:39:49,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-03-15 16:39:49,905 INFO L276 IsEmpty]: Start isEmpty. Operand 7843 states and 27287 transitions. [2022-03-15 16:39:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:49,917 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:49,917 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] [2022-03-15 16:39:49,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 16:39:50,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:50,118 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1901164380, now seen corresponding path program 20 times [2022-03-15 16:39:50,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:50,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787548950] [2022-03-15 16:39:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:50,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:50,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:50,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787548950] [2022-03-15 16:39:50,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787548950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:50,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214742443] [2022-03-15 16:39:50,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:50,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:50,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:50,371 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:50,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:39:50,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:50,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:50,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:39:50,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:50,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:50,656 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 24 treesize of output 24 [2022-03-15 16:39:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:50,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:51,046 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:39:51,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-15 16:39:51,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:51,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:51,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:51,169 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 20 treesize of output 47 [2022-03-15 16:39:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:51,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214742443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:51,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:51,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-15 16:39:51,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762634937] [2022-03-15 16:39:51,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:51,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:39:51,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:39:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:39:51,320 INFO L87 Difference]: Start difference. First operand 7843 states and 27287 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-03-15 16:39:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:58,008 INFO L93 Difference]: Finished difference Result 14596 states and 46967 transitions. [2022-03-15 16:39:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-15 16:39:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 30 [2022-03-15 16:39:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:58,041 INFO L225 Difference]: With dead ends: 14596 [2022-03-15 16:39:58,041 INFO L226 Difference]: Without dead ends: 14492 [2022-03-15 16:39:58,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6252 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1633, Invalid=16727, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 16:39:58,042 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 844 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 4964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 966 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:58,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1076 Invalid, 4964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3827 Invalid, 0 Unknown, 966 Unchecked, 1.7s Time] [2022-03-15 16:39:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14492 states. [2022-03-15 16:39:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14492 to 7858. [2022-03-15 16:39:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 3.4789359806541937) internal successors, (27334), 7857 states have internal predecessors, (27334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 27334 transitions. [2022-03-15 16:39:58,294 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 27334 transitions. Word has length 30 [2022-03-15 16:39:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:58,294 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 27334 transitions. [2022-03-15 16:39:58,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-03-15 16:39:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 27334 transitions. [2022-03-15 16:39:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:58,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:58,307 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] [2022-03-15 16:39:58,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 16:39:58,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:58,511 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1211295284, now seen corresponding path program 21 times [2022-03-15 16:39:58,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:58,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815447133] [2022-03-15 16:39:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:58,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:58,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815447133] [2022-03-15 16:39:58,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815447133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:58,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380360414] [2022-03-15 16:39:58,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:58,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:58,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:58,744 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:58,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:39:58,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:39:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:39:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:59,034 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 21 treesize of output 13 [2022-03-15 16:39:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:59,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:59,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:59,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:59,349 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 19 treesize of output 54 [2022-03-15 16:39:59,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:59,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:59,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:59,470 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 20 treesize of output 47 [2022-03-15 16:39:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:59,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380360414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:59,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:59,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:39:59,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050606453] [2022-03-15 16:39:59,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:59,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:39:59,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:39:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:59,627 INFO L87 Difference]: Start difference. First operand 7858 states and 27334 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2022-03-15 16:40:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:07,246 INFO L93 Difference]: Finished difference Result 13827 states and 44982 transitions. [2022-03-15 16:40:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 16:40:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 30 [2022-03-15 16:40:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:07,276 INFO L225 Difference]: With dead ends: 13827 [2022-03-15 16:40:07,277 INFO L226 Difference]: Without dead ends: 13797 [2022-03-15 16:40:07,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2214, Invalid=18092, Unknown=0, NotChecked=0, Total=20306 [2022-03-15 16:40:07,278 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 623 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 4988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:07,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 948 Invalid, 4988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-15 16:40:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13797 states. [2022-03-15 16:40:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13797 to 7859. [2022-03-15 16:40:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 7858 states have (on average 3.4790022906592006) internal successors, (27338), 7858 states have internal predecessors, (27338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-03-15 16:40:07,465 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-03-15 16:40:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:07,465 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-03-15 16:40:07,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2022-03-15 16:40:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-03-15 16:40:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:07,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:07,477 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] [2022-03-15 16:40:07,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 16:40:07,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 16:40:07,679 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:07,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527216, now seen corresponding path program 22 times [2022-03-15 16:40:07,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:07,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313634763] [2022-03-15 16:40:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:07,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:07,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313634763] [2022-03-15 16:40:07,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313634763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:07,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401680675] [2022-03-15 16:40:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:40:07,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:07,908 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:07,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:40:07,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:40:07,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:40:07,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:08,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:08,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:08,156 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 19 treesize of output 19 [2022-03-15 16:40:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:08,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:08,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:08,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:08,535 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 19 treesize of output 54 [2022-03-15 16:40:08,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:08,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:08,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:08,679 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 20 treesize of output 47 [2022-03-15 16:40:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:08,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401680675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:08,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:08,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:40:08,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420972970] [2022-03-15 16:40:08,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:08,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:40:08,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:40:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:40:08,844 INFO L87 Difference]: Start difference. First operand 7859 states and 27338 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:19,226 INFO L93 Difference]: Finished difference Result 14735 states and 47614 transitions. [2022-03-15 16:40:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-15 16:40:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-03-15 16:40:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:19,260 INFO L225 Difference]: With dead ends: 14735 [2022-03-15 16:40:19,260 INFO L226 Difference]: Without dead ends: 14660 [2022-03-15 16:40:19,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12048 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3411, Invalid=27741, Unknown=0, NotChecked=0, Total=31152 [2022-03-15 16:40:19,262 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 759 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 5762 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 6537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:19,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1546 Invalid, 6537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5762 Invalid, 0 Unknown, 524 Unchecked, 2.5s Time] [2022-03-15 16:40:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14660 states. [2022-03-15 16:40:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14660 to 7859. [2022-03-15 16:40:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 7858 states have (on average 3.4790022906592006) internal successors, (27338), 7858 states have internal predecessors, (27338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-03-15 16:40:19,485 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-03-15 16:40:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-03-15 16:40:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-03-15 16:40:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:19,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:19,497 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] [2022-03-15 16:40:19,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:40:19,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:19,697 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1359410238, now seen corresponding path program 23 times [2022-03-15 16:40:19,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:19,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103944282] [2022-03-15 16:40:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:19,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:19,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:19,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103944282] [2022-03-15 16:40:19,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103944282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:19,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868713892] [2022-03-15 16:40:19,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:40:19,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:19,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:19,929 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:19,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:40:19,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:40:19,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:40:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,241 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 28 treesize of output 16 [2022-03-15 16:40:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:20,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:20,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:20,548 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 19 treesize of output 54 [2022-03-15 16:40:20,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:20,682 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 20 treesize of output 47 [2022-03-15 16:40:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:20,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868713892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:20,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:20,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-15 16:40:20,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469045272] [2022-03-15 16:40:20,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:20,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:40:20,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:40:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:40:20,868 INFO L87 Difference]: Start difference. First operand 7859 states and 27338 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:25,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:25,880 INFO L93 Difference]: Finished difference Result 12864 states and 41779 transitions. [2022-03-15 16:40:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 16:40:25,881 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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 30 [2022-03-15 16:40:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:25,910 INFO L225 Difference]: With dead ends: 12864 [2022-03-15 16:40:25,910 INFO L226 Difference]: Without dead ends: 12834 [2022-03-15 16:40:25,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3794 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1478, Invalid=9864, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 16:40:25,912 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 647 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:25,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 567 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:40:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-03-15 16:40:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 7861. [2022-03-15 16:40:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7861 states, 7860 states have (on average 3.4790076335877864) internal successors, (27345), 7860 states have internal predecessors, (27345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 27345 transitions. [2022-03-15 16:40:26,122 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 27345 transitions. Word has length 30 [2022-03-15 16:40:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:26,122 INFO L470 AbstractCegarLoop]: Abstraction has 7861 states and 27345 transitions. [2022-03-15 16:40:26,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 27345 transitions. [2022-03-15 16:40:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:26,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:26,134 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] [2022-03-15 16:40:26,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 16:40:26,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:26,335 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1324381350, now seen corresponding path program 24 times [2022-03-15 16:40:26,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:26,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128797280] [2022-03-15 16:40:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:26,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:26,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:26,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128797280] [2022-03-15 16:40:26,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128797280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:26,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639363756] [2022-03-15 16:40:26,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:40:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:26,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:26,563 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:26,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:40:26,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:40:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:26,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:40:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:26,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:26,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:26,821 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-03-15 16:40:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:27,212 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:40:27,212 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 19 treesize of output 54 [2022-03-15 16:40:27,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:27,350 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 20 treesize of output 47 [2022-03-15 16:40:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:27,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639363756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:27,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:27,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-15 16:40:27,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962086386] [2022-03-15 16:40:27,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:27,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:40:27,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:40:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:40:27,526 INFO L87 Difference]: Start difference. First operand 7861 states and 27345 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-03-15 16:40:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:35,395 INFO L93 Difference]: Finished difference Result 13877 states and 45561 transitions. [2022-03-15 16:40:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-15 16:40:35,396 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 30 [2022-03-15 16:40:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:35,426 INFO L225 Difference]: With dead ends: 13877 [2022-03-15 16:40:35,426 INFO L226 Difference]: Without dead ends: 13845 [2022-03-15 16:40:35,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5388 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1637, Invalid=14113, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 16:40:35,428 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 643 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 4615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:35,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 982 Invalid, 4615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3974 Invalid, 0 Unknown, 458 Unchecked, 1.7s Time] [2022-03-15 16:40:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2022-03-15 16:40:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 7898. [2022-03-15 16:40:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 7897 states have (on average 3.4795491958971763) internal successors, (27478), 7897 states have internal predecessors, (27478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 27478 transitions. [2022-03-15 16:40:35,666 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 27478 transitions. Word has length 30 [2022-03-15 16:40:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:35,666 INFO L470 AbstractCegarLoop]: Abstraction has 7898 states and 27478 transitions. [2022-03-15 16:40:35,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-03-15 16:40:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 27478 transitions. [2022-03-15 16:40:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:35,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:35,678 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] [2022-03-15 16:40:35,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 16:40:35,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:35,878 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -511893078, now seen corresponding path program 25 times [2022-03-15 16:40:35,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:35,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466240369] [2022-03-15 16:40:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:35,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:36,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:36,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466240369] [2022-03-15 16:40:36,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466240369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:36,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949122917] [2022-03-15 16:40:36,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:40:36,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:36,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:36,106 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:36,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:40:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:40:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:36,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:36,405 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 24 treesize of output 16 [2022-03-15 16:40:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:36,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:36,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:36,722 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 19 treesize of output 54 [2022-03-15 16:40:36,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:36,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:36,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:36,862 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 20 treesize of output 47 [2022-03-15 16:40:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:37,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949122917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:37,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:37,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:40:37,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254569928] [2022-03-15 16:40:37,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:40:37,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:40:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:40:37,057 INFO L87 Difference]: Start difference. First operand 7898 states and 27478 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:44,352 INFO L93 Difference]: Finished difference Result 13318 states and 43304 transitions. [2022-03-15 16:40:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 16:40:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-03-15 16:40:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:44,380 INFO L225 Difference]: With dead ends: 13318 [2022-03-15 16:40:44,380 INFO L226 Difference]: Without dead ends: 13296 [2022-03-15 16:40:44,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5853 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2084, Invalid=14428, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:40:44,381 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 791 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 3761 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:44,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 720 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3761 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:40:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13296 states. [2022-03-15 16:40:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13296 to 7899. [2022-03-15 16:40:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7899 states, 7898 states have (on average 3.479615092428463) internal successors, (27482), 7898 states have internal predecessors, (27482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 27482 transitions. [2022-03-15 16:40:44,562 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 27482 transitions. Word has length 30 [2022-03-15 16:40:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:44,563 INFO L470 AbstractCegarLoop]: Abstraction has 7899 states and 27482 transitions. [2022-03-15 16:40:44,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 27482 transitions. [2022-03-15 16:40:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:44,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:44,575 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] [2022-03-15 16:40:44,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 16:40:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-15 16:40:44,775 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 456149418, now seen corresponding path program 26 times [2022-03-15 16:40:44,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:44,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566730718] [2022-03-15 16:40:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:44,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:45,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:45,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566730718] [2022-03-15 16:40:45,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566730718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:45,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006538152] [2022-03-15 16:40:45,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:40:45,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:45,045 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:45,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:40:45,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:40:45,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:40:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:45,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:45,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:45,339 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2022-03-15 16:40:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:45,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:45,846 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:40:45,846 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 19 treesize of output 54 [2022-03-15 16:40:46,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:46,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:46,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:46,014 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 20 treesize of output 47 [2022-03-15 16:40:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:46,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006538152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:46,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:46,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-15 16:40:46,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314539677] [2022-03-15 16:40:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:46,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:40:46,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:40:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:40:46,173 INFO L87 Difference]: Start difference. First operand 7899 states and 27482 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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) [2022-03-15 16:41:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:01,623 INFO L93 Difference]: Finished difference Result 16236 states and 52944 transitions. [2022-03-15 16:41:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-03-15 16:41:01,623 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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 30 [2022-03-15 16:41:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:01,657 INFO L225 Difference]: With dead ends: 16236 [2022-03-15 16:41:01,657 INFO L226 Difference]: Without dead ends: 16184 [2022-03-15 16:41:01,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18212 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=6022, Invalid=38710, Unknown=0, NotChecked=0, Total=44732 [2022-03-15 16:41:01,660 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1103 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 6773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:01,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 966 Invalid, 6773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 4879 Invalid, 0 Unknown, 1427 Unchecked, 2.3s Time] [2022-03-15 16:41:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2022-03-15 16:41:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 7938. [2022-03-15 16:41:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7938 states, 7937 states have (on average 3.4833060350258283) internal successors, (27647), 7937 states have internal predecessors, (27647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 27647 transitions. [2022-03-15 16:41:01,879 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 27647 transitions. Word has length 30 [2022-03-15 16:41:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:01,879 INFO L470 AbstractCegarLoop]: Abstraction has 7938 states and 27647 transitions. [2022-03-15 16:41:01,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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) [2022-03-15 16:41:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 27647 transitions. [2022-03-15 16:41:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:01,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:01,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:01,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 16:41:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 16:41:02,091 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash -801041019, now seen corresponding path program 22 times [2022-03-15 16:41:02,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:02,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195697117] [2022-03-15 16:41:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:02,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:02,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:02,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195697117] [2022-03-15 16:41:02,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195697117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:02,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806655464] [2022-03-15 16:41:02,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:02,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:02,478 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:02,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:41:02,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:02,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:02,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:41:02,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:02,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:02,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:02,845 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 28 treesize of output 18 [2022-03-15 16:41:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:02,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:03,116 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:03,116 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 21 treesize of output 46 [2022-03-15 16:41:03,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:03,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:03,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:03,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806655464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:03,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:03,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-15 16:41:03,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245549691] [2022-03-15 16:41:03,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:03,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:41:03,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:41:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:03,238 INFO L87 Difference]: Start difference. First operand 7938 states and 27647 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:10,584 INFO L93 Difference]: Finished difference Result 16154 states and 53648 transitions. [2022-03-15 16:41:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 16:41:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:41:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:10,623 INFO L225 Difference]: With dead ends: 16154 [2022-03-15 16:41:10,623 INFO L226 Difference]: Without dead ends: 16107 [2022-03-15 16:41:10,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2594, Invalid=13918, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:41:10,624 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 865 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 4287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 3794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:10,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 783 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 16:41:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16107 states. [2022-03-15 16:41:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16107 to 7951. [2022-03-15 16:41:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.4813836477987423) internal successors, (27677), 7950 states have internal predecessors, (27677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 27677 transitions. [2022-03-15 16:41:10,872 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 27677 transitions. Word has length 30 [2022-03-15 16:41:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:10,873 INFO L470 AbstractCegarLoop]: Abstraction has 7951 states and 27677 transitions. [2022-03-15 16:41:10,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 27677 transitions. [2022-03-15 16:41:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:10,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:10,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:10,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:11,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-15 16:41:11,085 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:11,086 INFO L85 PathProgramCache]: Analyzing trace with hash -312520331, now seen corresponding path program 23 times [2022-03-15 16:41:11,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:11,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968278823] [2022-03-15 16:41:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:11,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:11,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:11,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968278823] [2022-03-15 16:41:11,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968278823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:11,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269211622] [2022-03-15 16:41:11,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:41:11,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:11,397 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:11,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:41:11,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:41:11,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:41:11,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:11,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:11,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:11,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-03-15 16:41:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:11,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:12,059 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:12,060 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 21 treesize of output 46 [2022-03-15 16:41:12,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:12,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:12,120 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 22 treesize of output 5 [2022-03-15 16:41:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:12,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269211622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:12,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:12,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-03-15 16:41:12,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937700588] [2022-03-15 16:41:12,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:12,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:41:12,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:41:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:41:12,191 INFO L87 Difference]: Start difference. First operand 7951 states and 27677 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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) [2022-03-15 16:41:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:33,499 INFO L93 Difference]: Finished difference Result 20702 states and 67784 transitions. [2022-03-15 16:41:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2022-03-15 16:41:33,500 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 30 [2022-03-15 16:41:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:33,545 INFO L225 Difference]: With dead ends: 20702 [2022-03-15 16:41:33,545 INFO L226 Difference]: Without dead ends: 20654 [2022-03-15 16:41:33,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41453 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=9257, Invalid=85915, Unknown=0, NotChecked=0, Total=95172 [2022-03-15 16:41:33,550 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1124 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 5521 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 6050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 5521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:33,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1159 Invalid, 6050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 5521 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-15 16:41:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20654 states. [2022-03-15 16:41:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20654 to 7972. [2022-03-15 16:41:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7972 states, 7971 states have (on average 3.482749968636307) internal successors, (27761), 7971 states have internal predecessors, (27761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 27761 transitions. [2022-03-15 16:41:33,832 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 27761 transitions. Word has length 30 [2022-03-15 16:41:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:33,832 INFO L470 AbstractCegarLoop]: Abstraction has 7972 states and 27761 transitions. [2022-03-15 16:41:33,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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) [2022-03-15 16:41:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 27761 transitions. [2022-03-15 16:41:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:33,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:33,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:33,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:34,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 16:41:34,045 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:34,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash -53764609, now seen corresponding path program 24 times [2022-03-15 16:41:34,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:34,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770178456] [2022-03-15 16:41:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:34,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:34,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:34,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770178456] [2022-03-15 16:41:34,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770178456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:34,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161937641] [2022-03-15 16:41:34,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:34,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:34,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:34,469 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:41:34,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:41:34,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:41:34,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:34,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:34,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:34,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:34,897 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 21 treesize of output 11 [2022-03-15 16:41:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:34,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:35,246 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:35,246 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 21 treesize of output 46 [2022-03-15 16:41:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:35,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-15 16:41:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:35,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161937641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:35,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:35,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-03-15 16:41:35,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662416031] [2022-03-15 16:41:35,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:35,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:41:35,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:41:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:41:35,390 INFO L87 Difference]: Start difference. First operand 7972 states and 27761 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-03-15 16:41:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:43,808 INFO L93 Difference]: Finished difference Result 16143 states and 53625 transitions. [2022-03-15 16:41:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-15 16:41:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 30 [2022-03-15 16:41:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:43,846 INFO L225 Difference]: With dead ends: 16143 [2022-03-15 16:41:43,846 INFO L226 Difference]: Without dead ends: 16096 [2022-03-15 16:41:43,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9478 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3565, Invalid=20927, Unknown=0, NotChecked=0, Total=24492 [2022-03-15 16:41:43,847 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 899 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 4940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 4379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:43,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 887 Invalid, 4940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 4379 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-15 16:41:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16096 states. [2022-03-15 16:41:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16096 to 7981. [2022-03-15 16:41:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 3.4845864661654136) internal successors, (27807), 7980 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 27807 transitions. [2022-03-15 16:41:44,045 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 27807 transitions. Word has length 30 [2022-03-15 16:41:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:44,045 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 27807 transitions. [2022-03-15 16:41:44,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-03-15 16:41:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 27807 transitions. [2022-03-15 16:41:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:44,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:44,057 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] [2022-03-15 16:41:44,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:44,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:44,272 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash 740544464, now seen corresponding path program 27 times [2022-03-15 16:41:44,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:44,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045197690] [2022-03-15 16:41:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:44,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:44,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:44,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045197690] [2022-03-15 16:41:44,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045197690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:44,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081441827] [2022-03-15 16:41:44,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:44,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:44,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:44,511 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:44,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:41:44,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:41:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:41:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:44,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:44,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:44,815 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 21 treesize of output 13 [2022-03-15 16:41:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:44,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:45,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:45,242 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 36 treesize of output 69 [2022-03-15 16:41:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:45,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081441827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:45,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:45,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:41:45,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240141223] [2022-03-15 16:41:45,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:45,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:41:45,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:41:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:45,730 INFO L87 Difference]: Start difference. First operand 7981 states and 27807 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:50,397 INFO L93 Difference]: Finished difference Result 12813 states and 40793 transitions. [2022-03-15 16:41:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-15 16:41:50,397 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-03-15 16:41:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:50,426 INFO L225 Difference]: With dead ends: 12813 [2022-03-15 16:41:50,426 INFO L226 Difference]: Without dead ends: 12791 [2022-03-15 16:41:50,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5739 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1705, Invalid=14297, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 16:41:50,428 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 621 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 3886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1245 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:50,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 813 Invalid, 3886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2495 Invalid, 0 Unknown, 1245 Unchecked, 1.1s Time] [2022-03-15 16:41:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2022-03-15 16:41:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 7977. [2022-03-15 16:41:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 3.484704112337011) internal successors, (27794), 7976 states have internal predecessors, (27794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 27794 transitions. [2022-03-15 16:41:50,615 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 27794 transitions. Word has length 30 [2022-03-15 16:41:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:50,615 INFO L470 AbstractCegarLoop]: Abstraction has 7977 states and 27794 transitions. [2022-03-15 16:41:50,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 27794 transitions. [2022-03-15 16:41:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:50,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:50,627 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] [2022-03-15 16:41:50,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 16:41:50,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:50,828 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash 193579860, now seen corresponding path program 28 times [2022-03-15 16:41:50,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:50,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152275388] [2022-03-15 16:41:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:50,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:51,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:51,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152275388] [2022-03-15 16:41:51,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152275388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:51,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66297465] [2022-03-15 16:41:51,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:51,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:51,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:51,072 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:51,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:41:51,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:51,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:41:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:51,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:51,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,353 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 24 treesize of output 16 [2022-03-15 16:41:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:51,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:51,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:51,670 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 19 treesize of output 54 [2022-03-15 16:41:51,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:51,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:51,833 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 20 treesize of output 47 [2022-03-15 16:41:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:52,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66297465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:52,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:52,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:41:52,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674343439] [2022-03-15 16:41:52,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:52,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:41:52,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:41:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:52,012 INFO L87 Difference]: Start difference. First operand 7977 states and 27794 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:59,354 INFO L93 Difference]: Finished difference Result 13886 states and 45259 transitions. [2022-03-15 16:41:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-15 16:41:59,354 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-03-15 16:41:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:59,383 INFO L225 Difference]: With dead ends: 13886 [2022-03-15 16:41:59,384 INFO L226 Difference]: Without dead ends: 13864 [2022-03-15 16:41:59,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7603 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2247, Invalid=18923, Unknown=0, NotChecked=0, Total=21170 [2022-03-15 16:41:59,385 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 588 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:59,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 849 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:41:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2022-03-15 16:41:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 7979. [2022-03-15 16:41:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 7978 states have (on average 3.484707946853848) internal successors, (27801), 7978 states have internal predecessors, (27801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 27801 transitions. [2022-03-15 16:41:59,592 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 27801 transitions. Word has length 30 [2022-03-15 16:41:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:59,592 INFO L470 AbstractCegarLoop]: Abstraction has 7979 states and 27801 transitions. [2022-03-15 16:41:59,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 27801 transitions. [2022-03-15 16:41:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:59,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:59,604 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] [2022-03-15 16:41:59,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 16:41:59,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:59,804 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1161622356, now seen corresponding path program 29 times [2022-03-15 16:41:59,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:59,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790340383] [2022-03-15 16:41:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:59,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:00,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:00,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790340383] [2022-03-15 16:42:00,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790340383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:00,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427269546] [2022-03-15 16:42:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:00,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:00,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:00,072 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:00,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:42:00,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:42:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:00,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:00,324 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 28 treesize of output 24 [2022-03-15 16:42:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:00,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:00,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:00,685 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 19 treesize of output 54 [2022-03-15 16:42:00,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:00,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:00,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:00,837 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 20 treesize of output 47 [2022-03-15 16:42:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:01,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427269546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:01,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:01,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-15 16:42:01,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536743864] [2022-03-15 16:42:01,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:01,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:42:01,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:42:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:42:01,006 INFO L87 Difference]: Start difference. First operand 7979 states and 27801 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:12,728 INFO L93 Difference]: Finished difference Result 15043 states and 48614 transitions. [2022-03-15 16:42:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-03-15 16:42:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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 30 [2022-03-15 16:42:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:12,763 INFO L225 Difference]: With dead ends: 15043 [2022-03-15 16:42:12,763 INFO L226 Difference]: Without dead ends: 15014 [2022-03-15 16:42:12,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15351 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3955, Invalid=35447, Unknown=0, NotChecked=0, Total=39402 [2022-03-15 16:42:12,765 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 688 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:12,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1211 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-15 16:42:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15014 states. [2022-03-15 16:42:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15014 to 7976. [2022-03-15 16:42:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7976 states, 7975 states have (on average 3.484388714733542) internal successors, (27788), 7975 states have internal predecessors, (27788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 27788 transitions. [2022-03-15 16:42:12,986 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 27788 transitions. Word has length 30 [2022-03-15 16:42:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:12,986 INFO L470 AbstractCegarLoop]: Abstraction has 7976 states and 27788 transitions. [2022-03-15 16:42:12,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 27788 transitions. [2022-03-15 16:42:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:12,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:12,999 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] [2022-03-15 16:42:13,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:13,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:13,199 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1258533564, now seen corresponding path program 30 times [2022-03-15 16:42:13,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:13,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055743142] [2022-03-15 16:42:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:13,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:13,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:13,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055743142] [2022-03-15 16:42:13,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055743142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:13,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238245263] [2022-03-15 16:42:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:13,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:13,569 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:13,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:42:13,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:42:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:42:13,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:13,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:13,806 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 21 treesize of output 29 [2022-03-15 16:42:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:14,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:14,757 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 19 treesize of output 46 [2022-03-15 16:42:14,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,830 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 20 treesize of output 5 [2022-03-15 16:42:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238245263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:14,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:14,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-15 16:42:14,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817686366] [2022-03-15 16:42:14,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:14,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:42:14,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:14,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:42:14,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:42:14,934 INFO L87 Difference]: Start difference. First operand 7976 states and 27788 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-03-15 16:42:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:31,685 INFO L93 Difference]: Finished difference Result 15939 states and 52512 transitions. [2022-03-15 16:42:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-15 16:42:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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 30 [2022-03-15 16:42:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:31,722 INFO L225 Difference]: With dead ends: 15939 [2022-03-15 16:42:31,722 INFO L226 Difference]: Without dead ends: 15826 [2022-03-15 16:42:31,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19742 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=5763, Invalid=43743, Unknown=0, NotChecked=0, Total=49506 [2022-03-15 16:42:31,724 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1204 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 7247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2076 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:31,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 1171 Invalid, 7247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 4737 Invalid, 0 Unknown, 2076 Unchecked, 2.4s Time] [2022-03-15 16:42:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2022-03-15 16:42:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 8034. [2022-03-15 16:42:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8034 states, 8033 states have (on average 3.487364620938628) internal successors, (28014), 8033 states have internal predecessors, (28014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 28014 transitions. [2022-03-15 16:42:31,930 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 28014 transitions. Word has length 30 [2022-03-15 16:42:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:31,931 INFO L470 AbstractCegarLoop]: Abstraction has 8034 states and 28014 transitions. [2022-03-15 16:42:31,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-03-15 16:42:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 28014 transitions. [2022-03-15 16:42:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:31,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:31,943 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] [2022-03-15 16:42:31,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 16:42:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:32,143 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash -553862034, now seen corresponding path program 31 times [2022-03-15 16:42:32,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:32,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019851261] [2022-03-15 16:42:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:32,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:32,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:32,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019851261] [2022-03-15 16:42:32,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019851261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:32,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280971014] [2022-03-15 16:42:32,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:32,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:32,457 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:32,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:42:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:32,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:42:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:32,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:32,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:32,677 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-03-15 16:42:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:32,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:33,076 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:42:33,076 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 19 treesize of output 54 [2022-03-15 16:42:33,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:33,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:33,237 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 20 treesize of output 47 [2022-03-15 16:42:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280971014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:33,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:33,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-15 16:42:33,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625503511] [2022-03-15 16:42:33,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:33,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:42:33,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:42:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:33,420 INFO L87 Difference]: Start difference. First operand 8034 states and 28014 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-03-15 16:42:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:37,336 INFO L93 Difference]: Finished difference Result 14061 states and 46525 transitions. [2022-03-15 16:42:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:42:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 30 [2022-03-15 16:42:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:37,370 INFO L225 Difference]: With dead ends: 14061 [2022-03-15 16:42:37,371 INFO L226 Difference]: Without dead ends: 14020 [2022-03-15 16:42:37,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=810, Invalid=6846, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:42:37,371 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 499 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:37,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 777 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3384 Invalid, 0 Unknown, 517 Unchecked, 1.4s Time] [2022-03-15 16:42:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14020 states. [2022-03-15 16:42:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14020 to 8023. [2022-03-15 16:42:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8023 states, 8022 states have (on average 3.486661680378958) internal successors, (27970), 8022 states have internal predecessors, (27970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8023 states to 8023 states and 27970 transitions. [2022-03-15 16:42:37,575 INFO L78 Accepts]: Start accepts. Automaton has 8023 states and 27970 transitions. Word has length 30 [2022-03-15 16:42:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:37,575 INFO L470 AbstractCegarLoop]: Abstraction has 8023 states and 27970 transitions. [2022-03-15 16:42:37,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2022-03-15 16:42:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8023 states and 27970 transitions. [2022-03-15 16:42:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:37,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:37,587 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] [2022-03-15 16:42:37,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:37,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 16:42:37,788 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2072629490, now seen corresponding path program 32 times [2022-03-15 16:42:37,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:37,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981436606] [2022-03-15 16:42:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:37,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:38,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:38,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981436606] [2022-03-15 16:42:38,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981436606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:38,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068641782] [2022-03-15 16:42:38,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:38,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:38,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:38,063 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:38,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:42:38,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:42:38,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:38,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:38,325 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 21 treesize of output 29 [2022-03-15 16:42:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:38,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:39,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:39,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:39,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:39,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-15 16:42:39,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:39,082 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 20 treesize of output 5 [2022-03-15 16:42:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:39,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068641782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:39,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:39,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-03-15 16:42:39,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118701204] [2022-03-15 16:42:39,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:42:39,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:42:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:42:39,181 INFO L87 Difference]: Start difference. First operand 8023 states and 27970 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-15 16:42:54,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:54,250 INFO L93 Difference]: Finished difference Result 16255 states and 54161 transitions. [2022-03-15 16:42:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-03-15 16:42:54,250 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 30 [2022-03-15 16:42:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:54,285 INFO L225 Difference]: With dead ends: 16255 [2022-03-15 16:42:54,286 INFO L226 Difference]: Without dead ends: 16202 [2022-03-15 16:42:54,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17497 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4968, Invalid=40188, Unknown=0, NotChecked=0, Total=45156 [2022-03-15 16:42:54,288 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1035 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 4579 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 7514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 4579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2533 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:54,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1056 Invalid, 7514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 4579 Invalid, 0 Unknown, 2533 Unchecked, 2.4s Time] [2022-03-15 16:42:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16202 states. [2022-03-15 16:42:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16202 to 8006. [2022-03-15 16:42:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8006 states, 8005 states have (on average 3.484946908182386) internal successors, (27897), 8005 states have internal predecessors, (27897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 27897 transitions. [2022-03-15 16:42:54,505 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 27897 transitions. Word has length 30 [2022-03-15 16:42:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:54,505 INFO L470 AbstractCegarLoop]: Abstraction has 8006 states and 27897 transitions. [2022-03-15 16:42:54,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2022-03-15 16:42:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 27897 transitions. [2022-03-15 16:42:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:54,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:54,518 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] [2022-03-15 16:42:54,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 16:42:54,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 16:42:54,718 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -638630994, now seen corresponding path program 33 times [2022-03-15 16:42:54,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:54,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216057389] [2022-03-15 16:42:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:54,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:54,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216057389] [2022-03-15 16:42:54,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216057389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:54,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645317017] [2022-03-15 16:42:54,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:54,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:54,984 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:54,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:42:55,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:42:55,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:42:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:55,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:55,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:55,261 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-03-15 16:42:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:55,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:55,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:55,783 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 36 treesize of output 69 [2022-03-15 16:42:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:56,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645317017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:56,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:56,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:42:56,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089863355] [2022-03-15 16:42:56,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:56,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:42:56,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:56,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:42:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:56,488 INFO L87 Difference]: Start difference. First operand 8006 states and 27897 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:01,112 INFO L93 Difference]: Finished difference Result 13775 states and 45224 transitions. [2022-03-15 16:43:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 16:43:01,112 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-03-15 16:43:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:01,144 INFO L225 Difference]: With dead ends: 13775 [2022-03-15 16:43:01,144 INFO L226 Difference]: Without dead ends: 13768 [2022-03-15 16:43:01,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4252 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1425, Invalid=10347, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:43:01,145 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 439 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 722 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:01,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 705 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2859 Invalid, 0 Unknown, 722 Unchecked, 1.3s Time] [2022-03-15 16:43:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13768 states. [2022-03-15 16:43:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13768 to 8005. [2022-03-15 16:43:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8005 states, 8004 states have (on average 3.48488255872064) internal successors, (27893), 8004 states have internal predecessors, (27893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 27893 transitions. [2022-03-15 16:43:01,355 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 27893 transitions. Word has length 30 [2022-03-15 16:43:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:01,355 INFO L470 AbstractCegarLoop]: Abstraction has 8005 states and 27893 transitions. [2022-03-15 16:43:01,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 27893 transitions. [2022-03-15 16:43:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:01,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:01,368 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] [2022-03-15 16:43:01,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 16:43:01,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:01,568 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 459794410, now seen corresponding path program 34 times [2022-03-15 16:43:01,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:01,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828360087] [2022-03-15 16:43:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:01,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:01,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:01,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828360087] [2022-03-15 16:43:01,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828360087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:01,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880210868] [2022-03-15 16:43:01,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:01,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:01,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:01,865 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:01,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:43:01,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:01,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:43:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:02,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:02,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:02,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:02,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:02,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:02,122 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-03-15 16:43:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:02,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:02,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:02,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:02,478 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 19 treesize of output 54 [2022-03-15 16:43:02,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:02,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:02,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:02,621 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 20 treesize of output 47 [2022-03-15 16:43:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:02,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880210868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:02,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:02,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-15 16:43:02,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092737114] [2022-03-15 16:43:02,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:02,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:02,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:02,802 INFO L87 Difference]: Start difference. First operand 8005 states and 27893 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:07,394 INFO L93 Difference]: Finished difference Result 13077 states and 42731 transitions. [2022-03-15 16:43:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 16:43:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-03-15 16:43:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:07,421 INFO L225 Difference]: With dead ends: 13077 [2022-03-15 16:43:07,421 INFO L226 Difference]: Without dead ends: 13040 [2022-03-15 16:43:07,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1218, Invalid=8288, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:43:07,422 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 449 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:07,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 715 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2836 Invalid, 0 Unknown, 449 Unchecked, 1.3s Time] [2022-03-15 16:43:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13040 states. [2022-03-15 16:43:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13040 to 8004. [2022-03-15 16:43:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8004 states, 8003 states have (on average 3.48494314632013) internal successors, (27890), 8003 states have internal predecessors, (27890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 27890 transitions. [2022-03-15 16:43:07,615 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 27890 transitions. Word has length 30 [2022-03-15 16:43:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:07,615 INFO L470 AbstractCegarLoop]: Abstraction has 8004 states and 27890 transitions. [2022-03-15 16:43:07,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 27890 transitions. [2022-03-15 16:43:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:07,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:07,628 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] [2022-03-15 16:43:07,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 16:43:07,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:07,828 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1354496730, now seen corresponding path program 35 times [2022-03-15 16:43:07,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:07,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778340840] [2022-03-15 16:43:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:08,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:08,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778340840] [2022-03-15 16:43:08,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778340840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:08,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731695212] [2022-03-15 16:43:08,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:43:08,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:08,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:08,121 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:08,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:43:08,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:43:08,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:43:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:08,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:08,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:08,424 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 33 treesize of output 21 [2022-03-15 16:43:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:08,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:08,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:08,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:08,731 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 19 treesize of output 54 [2022-03-15 16:43:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:08,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:08,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:08,899 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 20 treesize of output 47 [2022-03-15 16:43:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:09,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731695212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:09,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:09,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-15 16:43:09,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981437107] [2022-03-15 16:43:09,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:09,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:43:09,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:09,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:43:09,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:43:09,060 INFO L87 Difference]: Start difference. First operand 8004 states and 27890 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:13,312 INFO L93 Difference]: Finished difference Result 12790 states and 41775 transitions. [2022-03-15 16:43:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:43:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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 30 [2022-03-15 16:43:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:13,337 INFO L225 Difference]: With dead ends: 12790 [2022-03-15 16:43:13,337 INFO L226 Difference]: Without dead ends: 12783 [2022-03-15 16:43:13,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1075, Invalid=7115, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 16:43:13,337 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 427 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:13,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 547 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:43:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12783 states. [2022-03-15 16:43:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12783 to 8007. [2022-03-15 16:43:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8007 states, 8006 states have (on average 3.4850112415688232) internal successors, (27901), 8006 states have internal predecessors, (27901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 27901 transitions. [2022-03-15 16:43:13,503 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 27901 transitions. Word has length 30 [2022-03-15 16:43:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 8007 states and 27901 transitions. [2022-03-15 16:43:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 27901 transitions. [2022-03-15 16:43:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:13,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:13,515 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] [2022-03-15 16:43:13,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 16:43:13,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:13,716 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:13,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1285608810, now seen corresponding path program 36 times [2022-03-15 16:43:13,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:13,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115465964] [2022-03-15 16:43:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:13,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:14,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:14,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115465964] [2022-03-15 16:43:14,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115465964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:14,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192646887] [2022-03-15 16:43:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:43:14,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:14,010 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:14,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:43:14,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:43:14,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:43:14,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:14,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:14,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:14,258 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 16:43:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:14,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:14,640 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:43:14,641 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 19 treesize of output 54 [2022-03-15 16:43:14,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:14,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:14,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:14,779 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 20 treesize of output 47 [2022-03-15 16:43:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:14,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192646887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:14,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:14,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-15 16:43:14,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085071425] [2022-03-15 16:43:14,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:14,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:43:14,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:43:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:43:14,928 INFO L87 Difference]: Start difference. First operand 8007 states and 27901 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 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) [2022-03-15 16:43:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:20,577 INFO L93 Difference]: Finished difference Result 13667 states and 45204 transitions. [2022-03-15 16:43:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 16:43:20,578 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 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 30 [2022-03-15 16:43:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:20,607 INFO L225 Difference]: With dead ends: 13667 [2022-03-15 16:43:20,607 INFO L226 Difference]: Without dead ends: 13630 [2022-03-15 16:43:20,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=942, Invalid=8564, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:43:20,608 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 530 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:20,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 888 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3495 Invalid, 0 Unknown, 372 Unchecked, 1.6s Time] [2022-03-15 16:43:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13630 states. [2022-03-15 16:43:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13630 to 7954. [2022-03-15 16:43:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 3.4853514397082863) internal successors, (27719), 7953 states have internal predecessors, (27719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 27719 transitions. [2022-03-15 16:43:20,794 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 27719 transitions. Word has length 30 [2022-03-15 16:43:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:20,794 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 27719 transitions. [2022-03-15 16:43:20,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 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) [2022-03-15 16:43:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 27719 transitions. [2022-03-15 16:43:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:20,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:20,806 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] [2022-03-15 16:43:20,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 16:43:21,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-15 16:43:21,006 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash 788969820, now seen corresponding path program 37 times [2022-03-15 16:43:21,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:21,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762582870] [2022-03-15 16:43:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:21,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:21,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:21,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762582870] [2022-03-15 16:43:21,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762582870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:21,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526277606] [2022-03-15 16:43:21,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:43:21,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:21,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:21,254 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:21,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:43:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:43:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:21,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:21,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:21,570 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 24 treesize of output 16 [2022-03-15 16:43:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:21,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:21,862 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:43:21,863 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 19 treesize of output 54 [2022-03-15 16:43:22,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:22,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:22,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:22,045 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 19 treesize of output 46 [2022-03-15 16:43:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:22,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526277606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:22,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:22,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-15 16:43:22,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833809188] [2022-03-15 16:43:22,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:22,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:43:22,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:43:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:43:22,206 INFO L87 Difference]: Start difference. First operand 7954 states and 27719 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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) [2022-03-15 16:43:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:27,310 INFO L93 Difference]: Finished difference Result 13093 states and 42430 transitions. [2022-03-15 16:43:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:43:27,310 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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 30 [2022-03-15 16:43:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:27,339 INFO L225 Difference]: With dead ends: 13093 [2022-03-15 16:43:27,339 INFO L226 Difference]: Without dead ends: 13048 [2022-03-15 16:43:27,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3492 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1105, Invalid=9607, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 16:43:27,340 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 554 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 3531 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 3715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:27,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 858 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3531 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:43:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13048 states. [2022-03-15 16:43:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13048 to 7969. [2022-03-15 16:43:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7969 states, 7968 states have (on average 3.487449799196787) internal successors, (27788), 7968 states have internal predecessors, (27788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7969 states to 7969 states and 27788 transitions. [2022-03-15 16:43:27,526 INFO L78 Accepts]: Start accepts. Automaton has 7969 states and 27788 transitions. Word has length 30 [2022-03-15 16:43:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:27,526 INFO L470 AbstractCegarLoop]: Abstraction has 7969 states and 27788 transitions. [2022-03-15 16:43:27,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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) [2022-03-15 16:43:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 7969 states and 27788 transitions. [2022-03-15 16:43:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:27,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:27,539 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] [2022-03-15 16:43:27,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 16:43:27,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 16:43:27,739 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2049272556, now seen corresponding path program 38 times [2022-03-15 16:43:27,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:27,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270745711] [2022-03-15 16:43:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:27,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:27,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270745711] [2022-03-15 16:43:27,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270745711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:27,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175278808] [2022-03-15 16:43:27,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:43:27,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:27,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:27,992 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:27,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:43:28,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:43:28,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:43:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:28,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:28,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:28,275 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 24 treesize of output 24 [2022-03-15 16:43:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:28,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:28,653 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:43:28,654 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 19 treesize of output 54 [2022-03-15 16:43:28,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:28,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:28,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:28,788 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 20 treesize of output 47 [2022-03-15 16:43:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:28,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175278808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:28,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:28,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-15 16:43:28,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416087861] [2022-03-15 16:43:28,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:28,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:28,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:28,942 INFO L87 Difference]: Start difference. First operand 7969 states and 27788 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-03-15 16:43:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:34,461 INFO L93 Difference]: Finished difference Result 14336 states and 46397 transitions. [2022-03-15 16:43:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 16:43:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 30 [2022-03-15 16:43:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:34,495 INFO L225 Difference]: With dead ends: 14336 [2022-03-15 16:43:34,496 INFO L226 Difference]: Without dead ends: 14232 [2022-03-15 16:43:34,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4328 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1246, Invalid=11636, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 16:43:34,497 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 523 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 4731 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 5198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:34,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 1359 Invalid, 5198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4731 Invalid, 0 Unknown, 317 Unchecked, 1.9s Time] [2022-03-15 16:43:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2022-03-15 16:43:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 7968. [2022-03-15 16:43:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7968 states, 7967 states have (on average 3.4853771808710934) internal successors, (27768), 7967 states have internal predecessors, (27768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7968 states to 7968 states and 27768 transitions. [2022-03-15 16:43:34,718 INFO L78 Accepts]: Start accepts. Automaton has 7968 states and 27768 transitions. Word has length 30 [2022-03-15 16:43:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:34,718 INFO L470 AbstractCegarLoop]: Abstraction has 7968 states and 27768 transitions. [2022-03-15 16:43:34,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-03-15 16:43:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7968 states and 27768 transitions. [2022-03-15 16:43:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:34,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:34,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:34,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 16:43:34,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 16:43:34,932 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:34,932 INFO L85 PathProgramCache]: Analyzing trace with hash -368775916, now seen corresponding path program 39 times [2022-03-15 16:43:34,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:34,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130205612] [2022-03-15 16:43:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:34,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:35,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:35,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130205612] [2022-03-15 16:43:35,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130205612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:35,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717800026] [2022-03-15 16:43:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:43:35,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:35,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:35,207 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:35,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:43:35,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:43:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:35,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:43:35,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:35,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:35,552 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 Received shutdown request... [2022-03-15 16:50:04,378 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 16:50:04,380 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 16:50:04,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 16:50:04,411 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:50:04,411 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:50:04,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 16:50:04,580 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. [2022-03-15 16:50:04,582 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 16:50:04,582 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 16:50:04,582 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 16:50:04,584 INFO L732 BasicCegarLoop]: Path program histogram: [39, 29, 24, 6, 3, 2, 1] [2022-03-15 16:50:04,586 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:50:04,586 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:50:04,588 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:50:04 BasicIcfg [2022-03-15 16:50:04,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:50:04,588 INFO L158 Benchmark]: Toolchain (without parser) took 786567.05ms. Allocated memory was 179.3MB in the beginning and 770.7MB in the end (delta: 591.4MB). Free memory was 138.8MB in the beginning and 183.4MB in the end (delta: -44.6MB). Peak memory consumption was 646.1MB. Max. memory is 8.0GB. [2022-03-15 16:50:04,588 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:50:04,588 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.45ms. Allocated memory is still 179.3MB. Free memory was 138.8MB in the beginning and 137.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:50:04,588 INFO L158 Benchmark]: Boogie Preprocessor took 10.45ms. Allocated memory is still 179.3MB. Free memory was 137.2MB in the beginning and 136.3MB in the end (delta: 891.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:50:04,588 INFO L158 Benchmark]: RCFGBuilder took 171.86ms. Allocated memory is still 179.3MB. Free memory was 136.1MB in the beginning and 127.3MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 16:50:04,588 INFO L158 Benchmark]: TraceAbstraction took 786354.12ms. Allocated memory was 179.3MB in the beginning and 770.7MB in the end (delta: 591.4MB). Free memory was 126.7MB in the beginning and 183.4MB in the end (delta: -56.7MB). Peak memory consumption was 633.5MB. Max. memory is 8.0GB. [2022-03-15 16:50:04,588 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 0.11ms. Allocated memory is still 179.3MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.45ms. Allocated memory is still 179.3MB. Free memory was 138.8MB in the beginning and 137.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.45ms. Allocated memory is still 179.3MB. Free memory was 137.2MB in the beginning and 136.3MB in the end (delta: 891.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 171.86ms. Allocated memory is still 179.3MB. Free memory was 136.1MB in the beginning and 127.3MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 786354.12ms. Allocated memory was 179.3MB in the beginning and 770.7MB in the end (delta: 591.4MB). Free memory was 126.7MB in the beginning and 183.4MB in the end (delta: -56.7MB). Peak memory consumption was 633.5MB. 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: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 53]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 52]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 52]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 786.3s, OverallIterations: 104, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.7s, AutomataDifference: 306.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48384 SdHoareTripleChecker+Valid, 73.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48384 mSDsluCounter, 41233 SdHoareTripleChecker+Invalid, 62.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14222 IncrementalHoareTripleChecker+Unchecked, 69252 mSDsCounter, 11607 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 161157 IncrementalHoareTripleChecker+Invalid, 186986 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11607 mSolverCounterUnsat, 3408 mSDtfsCounter, 161157 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11742 GetRequests, 4083 SyntacticMatches, 297 SemanticMatches, 7362 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 340143 ImplicationChecksByTransitivity, 241.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8034occurred in iteration=95, InterpolantAutomatonStates: 6675, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 11.8s AutomataMinimizationTime, 103 MinimizatonAttempts, 388397 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 55.7s InterpolantComputationTime, 5379 NumberOfCodeBlocks, 5376 NumberOfCodeBlocksAsserted, 305 NumberOfCheckSat, 7693 ConstructedInterpolants, 83 QuantifiedInterpolants, 88567 SizeOfPredicates, 943 NumberOfNonLiveVariables, 5860 ConjunctsInSsa, 1342 ConjunctsInUnsatCore, 293 InterpolantComputations, 9 PerfectInterpolantSequences, 320/1579 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