/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:06:12,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:06:12,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:06:12,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:06:12,195 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 14:06:12,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:06:12,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:06:12,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:06:12,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:06:12,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:06:12,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:06:12,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:06:12,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:06:12,222 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:06:12,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:06:12,222 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:06:12,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:06:12,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:06:12,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:06:12,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:06:12,224 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:06:12,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:06:12,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:06:12,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:06:12,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:06:12,455 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:06:12,456 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:06:12,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2022-02-16 14:06:12,457 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2022-02-16 14:06:12,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:06:12,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:06:12,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:06:12,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:06:12,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:06:12,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,502 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:06:12,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:06:12,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:06:12,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:06:12,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:06:12,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:06:12,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:06:12,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:06:12,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:06:12,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/1) ... [2022-02-16 14:06:12,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:06:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:12,588 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) [2022-02-16 14:06:12,611 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 [2022-02-16 14:06:12,629 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:06:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:06:12,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:06:12,630 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:06:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:06:12,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:06:12,630 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:06:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:06:12,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:06:12,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-16 14:06:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-16 14:06:12,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-16 14:06:12,632 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 14:06:12,663 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:06:12,664 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:06:12,772 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:06:12,782 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:06:12,782 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:06:12,784 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:06:12 BoogieIcfgContainer [2022-02-16 14:06:12,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:06:12,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:06:12,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:06:12,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:06:12,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:06:12" (1/2) ... [2022-02-16 14:06:12,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eda97af and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:06:12, skipping insertion in model container [2022-02-16 14:06:12,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:06:12" (2/2) ... [2022-02-16 14:06:12,791 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2022-02-16 14:06:12,797 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:06:12,797 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:06:12,797 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:06:12,797 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:06:12,848 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-16 14:06:12,913 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:06:12,917 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 [2022-02-16 14:06:12,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-16 14:06:12,924 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-02-16 14:06:12,958 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:14,648 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 138097 transitions and produced 46936 states. [2022-02-16 14:06:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 46936 states, 33022 states have (on average 1.8468293864696264) internal successors, (60986), 46935 states have internal predecessors, (60986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 14:06:15,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:15,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:15,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1997001160, now seen corresponding path program 1 times [2022-02-16 14:06:15,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:15,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433508263] [2022-02-16 14:06:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:15,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:15,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:15,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433508263] [2022-02-16 14:06:15,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433508263] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:06:15,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:06:15,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-16 14:06:15,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246098789] [2022-02-16 14:06:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:06:15,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:06:15,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:15,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:06:15,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:06:15,363 INFO L87 Difference]: Start difference. First operand has 46936 states, 33022 states have (on average 1.8468293864696264) internal successors, (60986), 46935 states have internal predecessors, (60986), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:16,279 INFO L93 Difference]: Finished difference Result 46932 states and 60982 transitions. [2022-02-16 14:06:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:06:16,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 14:06:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:16,376 INFO L225 Difference]: With dead ends: 46932 [2022-02-16 14:06:16,376 INFO L226 Difference]: Without dead ends: 12625 [2022-02-16 14:06:16,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:06:16,380 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:16,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12625 states. [2022-02-16 14:06:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12625 to 60. [2022-02-16 14:06:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2022-02-16 14:06:16,569 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 15 [2022-02-16 14:06:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:16,569 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2022-02-16 14:06:16,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2022-02-16 14:06:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 14:06:16,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:16,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:16,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:06:16,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:16,571 INFO L85 PathProgramCache]: Analyzing trace with hash -793003498, now seen corresponding path program 1 times [2022-02-16 14:06:16,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:16,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686060633] [2022-02-16 14:06:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:16,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:16,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:16,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686060633] [2022-02-16 14:06:16,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686060633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:16,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852363978] [2022-02-16 14:06:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:16,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:16,649 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) [2022-02-16 14:06:16,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 14:06:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:16,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-16 14:06:16,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:16,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852363978] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:16,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-16 14:06:16,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-02-16 14:06:16,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893698404] [2022-02-16 14:06:16,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:06:16,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:06:16,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:06:16,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:06:16,795 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:16,827 INFO L93 Difference]: Finished difference Result 85 states and 152 transitions. [2022-02-16 14:06:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:06:16,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 14:06:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:16,828 INFO L225 Difference]: With dead ends: 85 [2022-02-16 14:06:16,828 INFO L226 Difference]: Without dead ends: 85 [2022-02-16 14:06:16,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:06:16,829 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:16,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-16 14:06:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2022-02-16 14:06:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 131 transitions. [2022-02-16 14:06:16,833 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 131 transitions. Word has length 17 [2022-02-16 14:06:16,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:16,833 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 131 transitions. [2022-02-16 14:06:16,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 131 transitions. [2022-02-16 14:06:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 14:06:16,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:16,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:16,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:17,052 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 [2022-02-16 14:06:17,053 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash -765016038, now seen corresponding path program 1 times [2022-02-16 14:06:17,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:17,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481436297] [2022-02-16 14:06:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:17,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:17,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481436297] [2022-02-16 14:06:17,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481436297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:17,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184990519] [2022-02-16 14:06:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:17,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:17,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:17,130 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) [2022-02-16 14:06:17,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 14:06:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-16 14:06:17,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184990519] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:17,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-16 14:06:17,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-02-16 14:06:17,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352700712] [2022-02-16 14:06:17,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:06:17,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:06:17,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:06:17,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:06:17,270 INFO L87 Difference]: Start difference. First operand 68 states and 131 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:17,317 INFO L93 Difference]: Finished difference Result 90 states and 157 transitions. [2022-02-16 14:06:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:06:17,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 14:06:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:17,318 INFO L225 Difference]: With dead ends: 90 [2022-02-16 14:06:17,318 INFO L226 Difference]: Without dead ends: 90 [2022-02-16 14:06:17,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:06:17,319 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:17,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-16 14:06:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 64. [2022-02-16 14:06:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 117 transitions. [2022-02-16 14:06:17,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 117 transitions. Word has length 17 [2022-02-16 14:06:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:17,332 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 117 transitions. [2022-02-16 14:06:17,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 117 transitions. [2022-02-16 14:06:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 14:06:17,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:17,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:17,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:17,552 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 [2022-02-16 14:06:17,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1169127574, now seen corresponding path program 1 times [2022-02-16 14:06:17,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:17,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718959912] [2022-02-16 14:06:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:17,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:17,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718959912] [2022-02-16 14:06:17,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718959912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:06:17,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:06:17,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:06:17,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884868262] [2022-02-16 14:06:17,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:06:17,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:06:17,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:17,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:06:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:06:17,592 INFO L87 Difference]: Start difference. First operand 64 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:17,624 INFO L93 Difference]: Finished difference Result 82 states and 147 transitions. [2022-02-16 14:06:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:06:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 14:06:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:17,625 INFO L225 Difference]: With dead ends: 82 [2022-02-16 14:06:17,625 INFO L226 Difference]: Without dead ends: 75 [2022-02-16 14:06:17,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:06:17,626 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:17,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-16 14:06:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-02-16 14:06:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.878787878787879) internal successors, (124), 66 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 124 transitions. [2022-02-16 14:06:17,628 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 124 transitions. Word has length 17 [2022-02-16 14:06:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:17,628 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 124 transitions. [2022-02-16 14:06:17,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 124 transitions. [2022-02-16 14:06:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 14:06:17,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:17,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:17,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-16 14:06:17,629 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1430289164, now seen corresponding path program 1 times [2022-02-16 14:06:17,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:17,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083219023] [2022-02-16 14:06:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:17,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:17,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083219023] [2022-02-16 14:06:17,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083219023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:17,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018206592] [2022-02-16 14:06:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:17,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:17,665 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) [2022-02-16 14:06:17,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 14:06:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 14:06:17,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:17,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018206592] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:17,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:17,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-16 14:06:17,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23165831] [2022-02-16 14:06:17,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:17,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 14:06:17,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:17,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 14:06:17,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:06:17,769 INFO L87 Difference]: Start difference. First operand 67 states and 124 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:17,855 INFO L93 Difference]: Finished difference Result 131 states and 228 transitions. [2022-02-16 14:06:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 14:06:17,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 14:06:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:17,856 INFO L225 Difference]: With dead ends: 131 [2022-02-16 14:06:17,856 INFO L226 Difference]: Without dead ends: 131 [2022-02-16 14:06:17,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:06:17,857 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 84 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 30 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-16 14:06:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2022-02-16 14:06:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 176 transitions. [2022-02-16 14:06:17,860 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 176 transitions. Word has length 19 [2022-02-16 14:06:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:17,860 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 176 transitions. [2022-02-16 14:06:17,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 176 transitions. [2022-02-16 14:06:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 14:06:17,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:17,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:17,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:18,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:18,077 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash 873738914, now seen corresponding path program 1 times [2022-02-16 14:06:18,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:18,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868559708] [2022-02-16 14:06:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:18,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:18,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:18,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868559708] [2022-02-16 14:06:18,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868559708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:18,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103758355] [2022-02-16 14:06:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:18,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:18,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:18,176 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) [2022-02-16 14:06:18,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 14:06:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:06:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:18,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:18,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103758355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:18,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:18,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-16 14:06:18,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413361060] [2022-02-16 14:06:18,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:18,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:06:18,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:06:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:06:18,352 INFO L87 Difference]: Start difference. First operand 93 states and 176 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:18,434 INFO L93 Difference]: Finished difference Result 174 states and 319 transitions. [2022-02-16 14:06:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 14:06:18,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 14:06:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:18,435 INFO L225 Difference]: With dead ends: 174 [2022-02-16 14:06:18,435 INFO L226 Difference]: Without dead ends: 169 [2022-02-16 14:06:18,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:06:18,436 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:18,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 79 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-02-16 14:06:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2022-02-16 14:06:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.037313432835821) internal successors, (273), 134 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 273 transitions. [2022-02-16 14:06:18,440 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 273 transitions. Word has length 19 [2022-02-16 14:06:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:18,441 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 273 transitions. [2022-02-16 14:06:18,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 273 transitions. [2022-02-16 14:06:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 14:06:18,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:18,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:18,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:18,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:18,658 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:18,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -304143880, now seen corresponding path program 2 times [2022-02-16 14:06:18,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:18,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828172735] [2022-02-16 14:06:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:18,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:18,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:18,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828172735] [2022-02-16 14:06:18,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828172735] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:18,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073387658] [2022-02-16 14:06:18,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:18,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:18,702 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) [2022-02-16 14:06:18,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 14:06:18,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:18,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:06:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:18,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:18,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073387658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:18,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:18,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-16 14:06:18,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931961982] [2022-02-16 14:06:18,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:18,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 14:06:18,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 14:06:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:06:18,844 INFO L87 Difference]: Start difference. First operand 135 states and 273 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:18,883 INFO L93 Difference]: Finished difference Result 175 states and 334 transitions. [2022-02-16 14:06:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 14:06:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 14:06:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:18,885 INFO L225 Difference]: With dead ends: 175 [2022-02-16 14:06:18,885 INFO L226 Difference]: Without dead ends: 170 [2022-02-16 14:06:18,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:06:18,885 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:18,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-16 14:06:18,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-02-16 14:06:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.051470588235294) internal successors, (279), 136 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 279 transitions. [2022-02-16 14:06:18,889 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 279 transitions. Word has length 19 [2022-02-16 14:06:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:18,889 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 279 transitions. [2022-02-16 14:06:18,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 279 transitions. [2022-02-16 14:06:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:18,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:18,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:18,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:19,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:19,106 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash 318509138, now seen corresponding path program 2 times [2022-02-16 14:06:19,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:19,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214130409] [2022-02-16 14:06:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:19,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:19,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214130409] [2022-02-16 14:06:19,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214130409] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:19,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084358398] [2022-02-16 14:06:19,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:19,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:19,156 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) [2022-02-16 14:06:19,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 14:06:19,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:19,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:19,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:06:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084358398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:19,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:19,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-02-16 14:06:19,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474472952] [2022-02-16 14:06:19,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:19,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:06:19,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:06:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:06:19,277 INFO L87 Difference]: Start difference. First operand 137 states and 279 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:19,314 INFO L93 Difference]: Finished difference Result 199 states and 378 transitions. [2022-02-16 14:06:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 14:06:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:06:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:19,315 INFO L225 Difference]: With dead ends: 199 [2022-02-16 14:06:19,315 INFO L226 Difference]: Without dead ends: 194 [2022-02-16 14:06:19,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:06:19,315 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:19,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-16 14:06:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2022-02-16 14:06:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0277777777777777) internal successors, (292), 144 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 292 transitions. [2022-02-16 14:06:19,319 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 292 transitions. Word has length 21 [2022-02-16 14:06:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:19,319 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 292 transitions. [2022-02-16 14:06:19,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 292 transitions. [2022-02-16 14:06:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:19,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:19,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:19,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:19,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:19,536 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -364500202, now seen corresponding path program 3 times [2022-02-16 14:06:19,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:19,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717356313] [2022-02-16 14:06:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:19,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:19,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717356313] [2022-02-16 14:06:19,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717356313] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:19,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325245700] [2022-02-16 14:06:19,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:19,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:19,610 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) [2022-02-16 14:06:19,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 14:06:19,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 14:06:19,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:06:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:19,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325245700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:19,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:19,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-02-16 14:06:19,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779395646] [2022-02-16 14:06:19,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:19,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 14:06:19,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 14:06:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:06:19,773 INFO L87 Difference]: Start difference. First operand 145 states and 292 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:19,902 INFO L93 Difference]: Finished difference Result 227 states and 414 transitions. [2022-02-16 14:06:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 14:06:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:06:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:19,903 INFO L225 Difference]: With dead ends: 227 [2022-02-16 14:06:19,903 INFO L226 Difference]: Without dead ends: 201 [2022-02-16 14:06:19,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:19,904 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:19,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 123 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-16 14:06:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2022-02-16 14:06:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.032258064516129) internal successors, (315), 155 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 315 transitions. [2022-02-16 14:06:19,907 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 315 transitions. Word has length 21 [2022-02-16 14:06:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:19,908 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 315 transitions. [2022-02-16 14:06:19,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 315 transitions. [2022-02-16 14:06:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:19,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:19,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:19,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:20,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:20,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash -803199270, now seen corresponding path program 4 times [2022-02-16 14:06:20,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:20,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711292697] [2022-02-16 14:06:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:20,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:20,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:20,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711292697] [2022-02-16 14:06:20,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711292697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:20,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124392451] [2022-02-16 14:06:20,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:20,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:20,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:20,217 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) [2022-02-16 14:06:20,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 14:06:20,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:20,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:06:20,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:20,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:20,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124392451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:20,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:20,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-16 14:06:20,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988415680] [2022-02-16 14:06:20,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:20,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:06:20,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:06:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:06:20,429 INFO L87 Difference]: Start difference. First operand 156 states and 315 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:20,588 INFO L93 Difference]: Finished difference Result 234 states and 434 transitions. [2022-02-16 14:06:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:06:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:06:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:20,589 INFO L225 Difference]: With dead ends: 234 [2022-02-16 14:06:20,589 INFO L226 Difference]: Without dead ends: 203 [2022-02-16 14:06:20,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:20,589 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:20,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 120 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-16 14:06:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 174. [2022-02-16 14:06:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2022-02-16 14:06:20,593 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 21 [2022-02-16 14:06:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:20,593 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2022-02-16 14:06:20,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2022-02-16 14:06:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:20,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:20,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:20,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:20,803 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,SelfDestructingSolverStorable9 [2022-02-16 14:06:20,803 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash 717193028, now seen corresponding path program 3 times [2022-02-16 14:06:20,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:20,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192383657] [2022-02-16 14:06:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:20,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:20,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:20,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192383657] [2022-02-16 14:06:20,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192383657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:20,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122749161] [2022-02-16 14:06:20,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:20,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:20,835 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) [2022-02-16 14:06:20,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 14:06:20,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:06:20,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 14:06:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:20,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-16 14:06:20,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122749161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:06:20,908 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-16 14:06:20,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-02-16 14:06:20,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88117486] [2022-02-16 14:06:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:06:20,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:06:20,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:20,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:06:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:06:20,909 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-02-16 14:06:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:20,955 INFO L93 Difference]: Finished difference Result 217 states and 406 transitions. [2022-02-16 14:06:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 14:06:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 [2022-02-16 14:06:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:20,956 INFO L225 Difference]: With dead ends: 217 [2022-02-16 14:06:20,956 INFO L226 Difference]: Without dead ends: 210 [2022-02-16 14:06:20,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:06:20,956 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:20,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 24 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-16 14:06:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 191. [2022-02-16 14:06:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9684210526315788) internal successors, (374), 190 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 374 transitions. [2022-02-16 14:06:20,959 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 374 transitions. Word has length 21 [2022-02-16 14:06:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:20,960 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 374 transitions. [2022-02-16 14:06:20,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-02-16 14:06:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 374 transitions. [2022-02-16 14:06:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:20,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:20,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:20,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-16 14:06:21,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:21,177 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 732341120, now seen corresponding path program 4 times [2022-02-16 14:06:21,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:21,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609241491] [2022-02-16 14:06:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:21,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:21,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:21,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609241491] [2022-02-16 14:06:21,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609241491] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:06:21,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:06:21,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-16 14:06:21,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924288269] [2022-02-16 14:06:21,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:06:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:06:21,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:06:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:06:21,209 INFO L87 Difference]: Start difference. First operand 191 states and 374 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) [2022-02-16 14:06:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:21,236 INFO L93 Difference]: Finished difference Result 201 states and 378 transitions. [2022-02-16 14:06:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:06:21,236 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 [2022-02-16 14:06:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:21,237 INFO L225 Difference]: With dead ends: 201 [2022-02-16 14:06:21,237 INFO L226 Difference]: Without dead ends: 190 [2022-02-16 14:06:21,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:06:21,237 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:21,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:06:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-16 14:06:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 148. [2022-02-16 14:06:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.0476190476190474) internal successors, (301), 147 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 301 transitions. [2022-02-16 14:06:21,240 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 301 transitions. Word has length 21 [2022-02-16 14:06:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:21,240 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 301 transitions. [2022-02-16 14:06:21,240 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) [2022-02-16 14:06:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 301 transitions. [2022-02-16 14:06:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:21,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:21,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:21,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-16 14:06:21,241 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1857165658, now seen corresponding path program 5 times [2022-02-16 14:06:21,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:21,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364344190] [2022-02-16 14:06:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:21,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:21,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:21,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364344190] [2022-02-16 14:06:21,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364344190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:21,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618955329] [2022-02-16 14:06:21,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:21,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:21,281 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) [2022-02-16 14:06:21,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 14:06:21,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:06:21,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:06:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:21,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:21,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618955329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:21,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:21,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-02-16 14:06:21,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162070990] [2022-02-16 14:06:21,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:21,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:06:21,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:06:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:06:21,507 INFO L87 Difference]: Start difference. First operand 148 states and 301 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:21,646 INFO L93 Difference]: Finished difference Result 287 states and 535 transitions. [2022-02-16 14:06:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:06:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:06:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:21,648 INFO L225 Difference]: With dead ends: 287 [2022-02-16 14:06:21,648 INFO L226 Difference]: Without dead ends: 281 [2022-02-16 14:06:21,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:06:21,648 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:21,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 72 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-16 14:06:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 183. [2022-02-16 14:06:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.065934065934066) internal successors, (376), 182 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 376 transitions. [2022-02-16 14:06:21,652 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 376 transitions. Word has length 21 [2022-02-16 14:06:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:21,652 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 376 transitions. [2022-02-16 14:06:21,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 376 transitions. [2022-02-16 14:06:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:21,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:21,653 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] [2022-02-16 14:06:21,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:21,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-16 14:06:21,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1422668266, now seen corresponding path program 1 times [2022-02-16 14:06:21,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:21,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117487974] [2022-02-16 14:06:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:21,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:21,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:21,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117487974] [2022-02-16 14:06:21,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117487974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:21,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369215372] [2022-02-16 14:06:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:21,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:21,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:21,900 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) [2022-02-16 14:06:21,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 14:06:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:21,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:06:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:21,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:22,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369215372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:22,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:22,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-16 14:06:22,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835904579] [2022-02-16 14:06:22,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:22,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:06:22,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:06:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:22,095 INFO L87 Difference]: Start difference. First operand 183 states and 376 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2022-02-16 14:06:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:22,287 INFO L93 Difference]: Finished difference Result 443 states and 871 transitions. [2022-02-16 14:06:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:06:22,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:06:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:22,289 INFO L225 Difference]: With dead ends: 443 [2022-02-16 14:06:22,289 INFO L226 Difference]: Without dead ends: 443 [2022-02-16 14:06:22,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:22,290 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 137 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:22,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 60 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:22,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-16 14:06:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 283. [2022-02-16 14:06:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.3049645390070923) internal successors, (650), 282 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 650 transitions. [2022-02-16 14:06:22,296 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 650 transitions. Word has length 21 [2022-02-16 14:06:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:22,296 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 650 transitions. [2022-02-16 14:06:22,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2022-02-16 14:06:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 650 transitions. [2022-02-16 14:06:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:22,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:22,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:22,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:22,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-16 14:06:22,511 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 539462806, now seen corresponding path program 6 times [2022-02-16 14:06:22,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:22,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866716278] [2022-02-16 14:06:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:22,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:22,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:22,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866716278] [2022-02-16 14:06:22,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866716278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:22,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701275123] [2022-02-16 14:06:22,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:22,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:22,536 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) [2022-02-16 14:06:22,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 14:06:22,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 14:06:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:06:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:22,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:22,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701275123] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:22,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:22,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-02-16 14:06:22,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229997002] [2022-02-16 14:06:22,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:22,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:06:22,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:06:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:22,681 INFO L87 Difference]: Start difference. First operand 283 states and 650 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-16 14:06:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:22,769 INFO L93 Difference]: Finished difference Result 373 states and 783 transitions. [2022-02-16 14:06:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:06:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 21 [2022-02-16 14:06:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:22,770 INFO L225 Difference]: With dead ends: 373 [2022-02-16 14:06:22,770 INFO L226 Difference]: Without dead ends: 358 [2022-02-16 14:06:22,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:06:22,771 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:22,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 67 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-16 14:06:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 286. [2022-02-16 14:06:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.263157894736842) internal successors, (645), 285 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 645 transitions. [2022-02-16 14:06:22,776 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 645 transitions. Word has length 21 [2022-02-16 14:06:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:22,776 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 645 transitions. [2022-02-16 14:06:22,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-16 14:06:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 645 transitions. [2022-02-16 14:06:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:22,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:22,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:22,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:22,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-16 14:06:22,988 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:22,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash -865882112, now seen corresponding path program 7 times [2022-02-16 14:06:22,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:22,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944508513] [2022-02-16 14:06:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:22,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:23,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:23,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944508513] [2022-02-16 14:06:23,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944508513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:23,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949871749] [2022-02-16 14:06:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:23,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:23,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:23,023 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) [2022-02-16 14:06:23,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 14:06:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:23,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:06:23,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:23,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:23,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949871749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:23,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:23,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-02-16 14:06:23,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022719242] [2022-02-16 14:06:23,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:23,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:06:23,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:06:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:06:23,173 INFO L87 Difference]: Start difference. First operand 286 states and 645 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:23,352 INFO L93 Difference]: Finished difference Result 701 states and 1559 transitions. [2022-02-16 14:06:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:06:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:06:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:23,355 INFO L225 Difference]: With dead ends: 701 [2022-02-16 14:06:23,355 INFO L226 Difference]: Without dead ends: 701 [2022-02-16 14:06:23,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:06:23,356 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 126 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:23,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 60 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-16 14:06:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 368. [2022-02-16 14:06:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.4087193460490464) internal successors, (884), 367 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 884 transitions. [2022-02-16 14:06:23,365 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 884 transitions. Word has length 21 [2022-02-16 14:06:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:23,365 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 884 transitions. [2022-02-16 14:06:23,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 884 transitions. [2022-02-16 14:06:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:06:23,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:23,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:23,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:23,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-16 14:06:23,582 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1242374354, now seen corresponding path program 8 times [2022-02-16 14:06:23,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:23,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758526421] [2022-02-16 14:06:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:23,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:23,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:23,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758526421] [2022-02-16 14:06:23,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758526421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:23,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424025879] [2022-02-16 14:06:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:23,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:23,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:23,611 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) [2022-02-16 14:06:23,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 14:06:23,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:23,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:23,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:06:23,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:23,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:23,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424025879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:23,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:23,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-02-16 14:06:23,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188342058] [2022-02-16 14:06:23,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:23,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:06:23,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:06:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:06:23,761 INFO L87 Difference]: Start difference. First operand 368 states and 884 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:23,876 INFO L93 Difference]: Finished difference Result 577 states and 1279 transitions. [2022-02-16 14:06:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:06:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:06:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:23,879 INFO L225 Difference]: With dead ends: 577 [2022-02-16 14:06:23,879 INFO L226 Difference]: Without dead ends: 570 [2022-02-16 14:06:23,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:06:23,879 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:23,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 57 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-16 14:06:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 464. [2022-02-16 14:06:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.362850971922246) internal successors, (1094), 463 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1094 transitions. [2022-02-16 14:06:23,888 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1094 transitions. Word has length 21 [2022-02-16 14:06:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:23,888 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1094 transitions. [2022-02-16 14:06:23,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1094 transitions. [2022-02-16 14:06:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:23,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:23,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:23,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:24,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:24,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash 508738992, now seen corresponding path program 5 times [2022-02-16 14:06:24,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:24,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48033608] [2022-02-16 14:06:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:24,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:24,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:24,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48033608] [2022-02-16 14:06:24,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48033608] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:24,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557262348] [2022-02-16 14:06:24,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:24,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:24,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:24,150 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) [2022-02-16 14:06:24,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 14:06:24,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:06:24,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:06:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:24,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:24,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557262348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:24,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:24,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-16 14:06:24,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793694710] [2022-02-16 14:06:24,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:24,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:06:24,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:06:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:06:24,302 INFO L87 Difference]: Start difference. First operand 464 states and 1094 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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) [2022-02-16 14:06:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:24,564 INFO L93 Difference]: Finished difference Result 1785 states and 4359 transitions. [2022-02-16 14:06:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:06:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 23 [2022-02-16 14:06:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:24,571 INFO L225 Difference]: With dead ends: 1785 [2022-02-16 14:06:24,571 INFO L226 Difference]: Without dead ends: 1785 [2022-02-16 14:06:24,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:06:24,572 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:24,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 60 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:06:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-02-16 14:06:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 951. [2022-02-16 14:06:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 2.6126315789473686) internal successors, (2482), 950 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2482 transitions. [2022-02-16 14:06:24,596 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2482 transitions. Word has length 23 [2022-02-16 14:06:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:24,596 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 2482 transitions. [2022-02-16 14:06:24,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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) [2022-02-16 14:06:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2482 transitions. [2022-02-16 14:06:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:24,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:24,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:24,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:24,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-16 14:06:24,814 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1581464624, now seen corresponding path program 6 times [2022-02-16 14:06:24,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:24,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356363446] [2022-02-16 14:06:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:24,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:24,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:24,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356363446] [2022-02-16 14:06:24,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356363446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:24,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205674626] [2022-02-16 14:06:24,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:24,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:24,842 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) [2022-02-16 14:06:24,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 14:06:24,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:06:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:06:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:24,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:25,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205674626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:25,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:25,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-02-16 14:06:25,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257857762] [2022-02-16 14:06:25,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:25,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:06:25,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:25,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:06:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:25,023 INFO L87 Difference]: Start difference. First operand 951 states and 2482 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:25,179 INFO L93 Difference]: Finished difference Result 1233 states and 3013 transitions. [2022-02-16 14:06:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:06:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:25,183 INFO L225 Difference]: With dead ends: 1233 [2022-02-16 14:06:25,183 INFO L226 Difference]: Without dead ends: 1224 [2022-02-16 14:06:25,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:25,184 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:25,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-02-16 14:06:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 975. [2022-02-16 14:06:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.582135523613963) internal successors, (2515), 974 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2515 transitions. [2022-02-16 14:06:25,201 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2515 transitions. Word has length 23 [2022-02-16 14:06:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:25,201 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2515 transitions. [2022-02-16 14:06:25,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2515 transitions. [2022-02-16 14:06:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:25,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:25,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:25,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:25,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:25,419 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 231228706, now seen corresponding path program 2 times [2022-02-16 14:06:25,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:25,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352979775] [2022-02-16 14:06:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:25,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:25,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:25,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352979775] [2022-02-16 14:06:25,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352979775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:25,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305186615] [2022-02-16 14:06:25,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:25,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:25,462 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) [2022-02-16 14:06:25,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 14:06:25,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:25,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:06:25,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:25,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:25,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305186615] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:25,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:25,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 14:06:25,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994436526] [2022-02-16 14:06:25,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:25,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:06:25,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:06:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:06:25,685 INFO L87 Difference]: Start difference. First operand 975 states and 2515 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:26,048 INFO L93 Difference]: Finished difference Result 2138 states and 5214 transitions. [2022-02-16 14:06:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:06:26,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:26,055 INFO L225 Difference]: With dead ends: 2138 [2022-02-16 14:06:26,055 INFO L226 Difference]: Without dead ends: 2138 [2022-02-16 14:06:26,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:06:26,056 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 213 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:26,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 95 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:06:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-02-16 14:06:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 932. [2022-02-16 14:06:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.5069817400644467) internal successors, (2334), 931 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2334 transitions. [2022-02-16 14:06:26,087 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2334 transitions. Word has length 23 [2022-02-16 14:06:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 2334 transitions. [2022-02-16 14:06:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2334 transitions. [2022-02-16 14:06:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:26,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:26,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:26,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:26,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:26,303 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1955482124, now seen corresponding path program 7 times [2022-02-16 14:06:26,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:26,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184180882] [2022-02-16 14:06:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:26,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:26,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:26,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184180882] [2022-02-16 14:06:26,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184180882] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:26,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303521529] [2022-02-16 14:06:26,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:26,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:26,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:26,334 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) [2022-02-16 14:06:26,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 14:06:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:06:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:26,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:26,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303521529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:26,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:26,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-16 14:06:26,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035452931] [2022-02-16 14:06:26,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:26,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:06:26,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:06:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:06:26,577 INFO L87 Difference]: Start difference. First operand 932 states and 2334 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:26,839 INFO L93 Difference]: Finished difference Result 1322 states and 3138 transitions. [2022-02-16 14:06:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:06:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:26,842 INFO L225 Difference]: With dead ends: 1322 [2022-02-16 14:06:26,842 INFO L226 Difference]: Without dead ends: 1315 [2022-02-16 14:06:26,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:06:26,843 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:26,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 61 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-02-16 14:06:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1047. [2022-02-16 14:06:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 2.517208413001912) internal successors, (2633), 1046 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 2633 transitions. [2022-02-16 14:06:26,860 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 2633 transitions. Word has length 23 [2022-02-16 14:06:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:26,860 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 2633 transitions. [2022-02-16 14:06:26,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 2633 transitions. [2022-02-16 14:06:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:26,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:26,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:26,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-16 14:06:27,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:27,094 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash -277667780, now seen corresponding path program 3 times [2022-02-16 14:06:27,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:27,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818050413] [2022-02-16 14:06:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:27,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:27,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:27,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818050413] [2022-02-16 14:06:27,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818050413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:27,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434743916] [2022-02-16 14:06:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:27,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:27,136 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) [2022-02-16 14:06:27,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:06:27,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:06:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:27,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 14:06:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:27,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:27,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434743916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:27,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:27,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 14:06:27,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128571408] [2022-02-16 14:06:27,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:27,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:06:27,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:06:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:06:27,392 INFO L87 Difference]: Start difference. First operand 1047 states and 2633 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2022-02-16 14:06:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:27,751 INFO L93 Difference]: Finished difference Result 2001 states and 4805 transitions. [2022-02-16 14:06:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:06:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:27,756 INFO L225 Difference]: With dead ends: 2001 [2022-02-16 14:06:27,756 INFO L226 Difference]: Without dead ends: 2001 [2022-02-16 14:06:27,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:06:27,757 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 192 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:27,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 63 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-02-16 14:06:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1115. [2022-02-16 14:06:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.5323159784560145) internal successors, (2821), 1114 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2821 transitions. [2022-02-16 14:06:27,781 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2821 transitions. Word has length 23 [2022-02-16 14:06:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:27,781 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2821 transitions. [2022-02-16 14:06:27,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2022-02-16 14:06:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2821 transitions. [2022-02-16 14:06:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:27,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:27,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:27,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:27,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:27,999 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:28,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1656475832, now seen corresponding path program 8 times [2022-02-16 14:06:28,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:28,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340337850] [2022-02-16 14:06:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:28,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:28,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:28,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340337850] [2022-02-16 14:06:28,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340337850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:28,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759181267] [2022-02-16 14:06:28,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:28,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:28,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:28,030 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) [2022-02-16 14:06:28,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 14:06:28,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:28,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:06:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:28,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:28,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759181267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:28,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:28,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-02-16 14:06:28,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119441050] [2022-02-16 14:06:28,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:28,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:06:28,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:06:28,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:28,282 INFO L87 Difference]: Start difference. First operand 1115 states and 2821 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:28,565 INFO L93 Difference]: Finished difference Result 1410 states and 3367 transitions. [2022-02-16 14:06:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:06:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:28,568 INFO L225 Difference]: With dead ends: 1410 [2022-02-16 14:06:28,568 INFO L226 Difference]: Without dead ends: 1404 [2022-02-16 14:06:28,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:06:28,569 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:28,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 90 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-16 14:06:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1159. [2022-02-16 14:06:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 2.5319516407599307) internal successors, (2932), 1158 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2932 transitions. [2022-02-16 14:06:28,590 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2932 transitions. Word has length 23 [2022-02-16 14:06:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:28,590 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 2932 transitions. [2022-02-16 14:06:28,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2932 transitions. [2022-02-16 14:06:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:28,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:28,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:28,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:28,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-16 14:06:28,797 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:28,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1217776764, now seen corresponding path program 9 times [2022-02-16 14:06:28,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:28,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638346258] [2022-02-16 14:06:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:28,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:28,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:28,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638346258] [2022-02-16 14:06:28,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638346258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:28,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989140666] [2022-02-16 14:06:28,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:28,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:28,830 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) [2022-02-16 14:06:28,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 14:06:28,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:06:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:28,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 14:06:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:28,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:29,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989140666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:29,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:29,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-02-16 14:06:29,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511046411] [2022-02-16 14:06:29,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:29,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:06:29,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:06:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:29,093 INFO L87 Difference]: Start difference. First operand 1159 states and 2932 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:29,362 INFO L93 Difference]: Finished difference Result 1417 states and 3413 transitions. [2022-02-16 14:06:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:06:29,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:29,365 INFO L225 Difference]: With dead ends: 1417 [2022-02-16 14:06:29,365 INFO L226 Difference]: Without dead ends: 1409 [2022-02-16 14:06:29,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:06:29,369 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:29,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 78 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-02-16 14:06:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1148. [2022-02-16 14:06:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 2.5265911072362686) internal successors, (2898), 1147 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 2898 transitions. [2022-02-16 14:06:29,397 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 2898 transitions. Word has length 23 [2022-02-16 14:06:29,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:29,397 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 2898 transitions. [2022-02-16 14:06:29,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 2898 transitions. [2022-02-16 14:06:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:29,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:29,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:29,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:29,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-16 14:06:29,616 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1395528516, now seen corresponding path program 4 times [2022-02-16 14:06:29,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:29,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076474979] [2022-02-16 14:06:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:29,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:29,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:29,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076474979] [2022-02-16 14:06:29,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076474979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:29,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116779188] [2022-02-16 14:06:29,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:29,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:29,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:29,715 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) [2022-02-16 14:06:29,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:29,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 14:06:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:30,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116779188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:30,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:30,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 14:06:30,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069662559] [2022-02-16 14:06:30,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:30,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:06:30,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:06:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:30,185 INFO L87 Difference]: Start difference. First operand 1148 states and 2898 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) [2022-02-16 14:06:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:31,097 INFO L93 Difference]: Finished difference Result 2188 states and 5152 transitions. [2022-02-16 14:06:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:06:31,097 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 23 [2022-02-16 14:06:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:31,101 INFO L225 Difference]: With dead ends: 2188 [2022-02-16 14:06:31,101 INFO L226 Difference]: Without dead ends: 2173 [2022-02-16 14:06:31,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:06:31,102 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 198 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:31,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 78 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2022-02-16 14:06:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1198. [2022-02-16 14:06:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.5179615705931497) internal successors, (3014), 1197 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3014 transitions. [2022-02-16 14:06:31,133 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3014 transitions. Word has length 23 [2022-02-16 14:06:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:31,133 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3014 transitions. [2022-02-16 14:06:31,133 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) [2022-02-16 14:06:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3014 transitions. [2022-02-16 14:06:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:31,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:31,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:31,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:31,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:31,351 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1035297152, now seen corresponding path program 5 times [2022-02-16 14:06:31,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:31,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280252112] [2022-02-16 14:06:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:31,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:31,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:31,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280252112] [2022-02-16 14:06:31,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280252112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:31,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249158465] [2022-02-16 14:06:31,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:31,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:31,437 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) [2022-02-16 14:06:31,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 14:06:31,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:06:31,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:31,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:31,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249158465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:31,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:31,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 14:06:31,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932090361] [2022-02-16 14:06:31,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:06:31,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:06:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:31,865 INFO L87 Difference]: Start difference. First operand 1198 states and 3014 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:33,137 INFO L93 Difference]: Finished difference Result 2342 states and 5361 transitions. [2022-02-16 14:06:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 14:06:33,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:33,141 INFO L225 Difference]: With dead ends: 2342 [2022-02-16 14:06:33,141 INFO L226 Difference]: Without dead ends: 2322 [2022-02-16 14:06:33,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:06:33,143 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 235 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:33,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 141 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-02-16 14:06:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1211. [2022-02-16 14:06:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.5082644628099175) internal successors, (3035), 1210 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3035 transitions. [2022-02-16 14:06:33,167 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3035 transitions. Word has length 23 [2022-02-16 14:06:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:33,167 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 3035 transitions. [2022-02-16 14:06:33,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3035 transitions. [2022-02-16 14:06:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:33,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:33,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:33,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:33,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:33,385 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 890703958, now seen corresponding path program 6 times [2022-02-16 14:06:33,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:33,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020774020] [2022-02-16 14:06:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:33,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:33,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:33,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020774020] [2022-02-16 14:06:33,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020774020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:33,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471441711] [2022-02-16 14:06:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:33,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:33,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:33,494 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) [2022-02-16 14:06:33,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 14:06:33,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:06:33,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:33,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:33,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:33,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471441711] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:33,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:33,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 14:06:33,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96770053] [2022-02-16 14:06:33,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:33,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:06:33,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:06:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:33,937 INFO L87 Difference]: Start difference. First operand 1211 states and 3035 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) [2022-02-16 14:06:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:35,062 INFO L93 Difference]: Finished difference Result 1966 states and 4599 transitions. [2022-02-16 14:06:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:06:35,062 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 23 [2022-02-16 14:06:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:35,066 INFO L225 Difference]: With dead ends: 1966 [2022-02-16 14:06:35,066 INFO L226 Difference]: Without dead ends: 1956 [2022-02-16 14:06:35,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:06:35,067 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 212 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:35,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 94 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-02-16 14:06:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1209. [2022-02-16 14:06:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.506622516556291) internal successors, (3028), 1208 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3028 transitions. [2022-02-16 14:06:35,093 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3028 transitions. Word has length 23 [2022-02-16 14:06:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:35,093 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 3028 transitions. [2022-02-16 14:06:35,093 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) [2022-02-16 14:06:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3028 transitions. [2022-02-16 14:06:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:35,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:35,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:35,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:35,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-16 14:06:35,311 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1856157184, now seen corresponding path program 7 times [2022-02-16 14:06:35,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:35,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918394829] [2022-02-16 14:06:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:35,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:35,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:35,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918394829] [2022-02-16 14:06:35,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918394829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:35,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452225388] [2022-02-16 14:06:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:35,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:35,402 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) [2022-02-16 14:06:35,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 14:06:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:35,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:35,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452225388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:35,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:35,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 14:06:35,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741346819] [2022-02-16 14:06:35,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:35,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:06:35,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:06:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:35,951 INFO L87 Difference]: Start difference. First operand 1209 states and 3028 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) [2022-02-16 14:06:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:36,356 INFO L93 Difference]: Finished difference Result 1599 states and 3844 transitions. [2022-02-16 14:06:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:06:36,356 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 23 [2022-02-16 14:06:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:36,359 INFO L225 Difference]: With dead ends: 1599 [2022-02-16 14:06:36,359 INFO L226 Difference]: Without dead ends: 1594 [2022-02-16 14:06:36,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:06:36,360 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:36,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 80 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 271 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-02-16 14:06:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-02-16 14:06:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1211. [2022-02-16 14:06:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.507438016528926) internal successors, (3034), 1210 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3034 transitions. [2022-02-16 14:06:36,376 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3034 transitions. Word has length 23 [2022-02-16 14:06:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:36,377 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 3034 transitions. [2022-02-16 14:06:36,377 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) [2022-02-16 14:06:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3034 transitions. [2022-02-16 14:06:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:36,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:36,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:36,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:36,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-16 14:06:36,591 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1260927318, now seen corresponding path program 8 times [2022-02-16 14:06:36,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:36,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850578458] [2022-02-16 14:06:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:36,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:36,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:36,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850578458] [2022-02-16 14:06:36,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850578458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:36,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109535587] [2022-02-16 14:06:36,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:36,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:36,685 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) [2022-02-16 14:06:36,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 14:06:36,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:36,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:36,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:36,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:36,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:37,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109535587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:37,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:37,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 14:06:37,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580812989] [2022-02-16 14:06:37,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:37,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:06:37,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:37,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:06:37,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:37,164 INFO L87 Difference]: Start difference. First operand 1211 states and 3034 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-16 14:06:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:37,750 INFO L93 Difference]: Finished difference Result 1487 states and 3521 transitions. [2022-02-16 14:06:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:06:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:37,752 INFO L225 Difference]: With dead ends: 1487 [2022-02-16 14:06:37,752 INFO L226 Difference]: Without dead ends: 1472 [2022-02-16 14:06:37,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:06:37,753 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:37,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 423 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-02-16 14:06:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2022-02-16 14:06:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1211. [2022-02-16 14:06:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.505785123966942) internal successors, (3032), 1210 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3032 transitions. [2022-02-16 14:06:37,767 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3032 transitions. Word has length 23 [2022-02-16 14:06:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:37,767 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 3032 transitions. [2022-02-16 14:06:37,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-16 14:06:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3032 transitions. [2022-02-16 14:06:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:37,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:37,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:37,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-16 14:06:37,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-16 14:06:37,984 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -714104234, now seen corresponding path program 9 times [2022-02-16 14:06:37,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:37,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158939930] [2022-02-16 14:06:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:37,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:38,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:38,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158939930] [2022-02-16 14:06:38,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158939930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:38,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567892347] [2022-02-16 14:06:38,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:38,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:38,085 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) [2022-02-16 14:06:38,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 14:06:38,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:06:38,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:06:38,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:38,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:38,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567892347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:38,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:38,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 14:06:38,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603937417] [2022-02-16 14:06:38,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:38,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:06:38,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:06:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:38,578 INFO L87 Difference]: Start difference. First operand 1211 states and 3032 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:39,006 INFO L93 Difference]: Finished difference Result 1702 states and 4155 transitions. [2022-02-16 14:06:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:06:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:39,009 INFO L225 Difference]: With dead ends: 1702 [2022-02-16 14:06:39,009 INFO L226 Difference]: Without dead ends: 1687 [2022-02-16 14:06:39,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:06:39,010 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:39,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 86 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 302 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-02-16 14:06:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-02-16 14:06:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1224. [2022-02-16 14:06:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.510220768601799) internal successors, (3070), 1223 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3070 transitions. [2022-02-16 14:06:39,029 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3070 transitions. Word has length 23 [2022-02-16 14:06:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 3070 transitions. [2022-02-16 14:06:39,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3070 transitions. [2022-02-16 14:06:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:39,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:39,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:39,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:39,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:39,250 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash -507296268, now seen corresponding path program 10 times [2022-02-16 14:06:39,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:39,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985059904] [2022-02-16 14:06:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:39,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:39,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:39,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985059904] [2022-02-16 14:06:39,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985059904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:39,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184587486] [2022-02-16 14:06:39,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:39,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:39,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:39,313 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) [2022-02-16 14:06:39,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 14:06:39,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:39,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:06:39,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:39,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:39,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184587486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:39,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:39,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-02-16 14:06:39,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306542536] [2022-02-16 14:06:39,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:39,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:06:39,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:06:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:06:39,628 INFO L87 Difference]: Start difference. First operand 1224 states and 3070 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:40,307 INFO L93 Difference]: Finished difference Result 2914 states and 6790 transitions. [2022-02-16 14:06:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:06:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:40,312 INFO L225 Difference]: With dead ends: 2914 [2022-02-16 14:06:40,312 INFO L226 Difference]: Without dead ends: 2914 [2022-02-16 14:06:40,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:06:40,313 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 221 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:40,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 58 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:06:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2022-02-16 14:06:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 1592. [2022-02-16 14:06:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 2.5562539283469516) internal successors, (4067), 1591 states have internal predecessors, (4067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 4067 transitions. [2022-02-16 14:06:40,342 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 4067 transitions. Word has length 23 [2022-02-16 14:06:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:40,342 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 4067 transitions. [2022-02-16 14:06:40,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 4067 transitions. [2022-02-16 14:06:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:40,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:40,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:40,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:40,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:40,561 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1632121988, now seen corresponding path program 11 times [2022-02-16 14:06:40,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:40,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69399700] [2022-02-16 14:06:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:40,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:40,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:40,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69399700] [2022-02-16 14:06:40,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69399700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:40,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914254542] [2022-02-16 14:06:40,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:40,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:40,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:40,656 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) [2022-02-16 14:06:40,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 14:06:40,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:06:40,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:06:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:40,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:41,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914254542] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:41,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:41,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-02-16 14:06:41,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449840960] [2022-02-16 14:06:41,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:41,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:06:41,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:06:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:06:41,021 INFO L87 Difference]: Start difference. First operand 1592 states and 4067 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:42,164 INFO L93 Difference]: Finished difference Result 4714 states and 11358 transitions. [2022-02-16 14:06:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:06:42,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:42,173 INFO L225 Difference]: With dead ends: 4714 [2022-02-16 14:06:42,173 INFO L226 Difference]: Without dead ends: 4714 [2022-02-16 14:06:42,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=867, Invalid=2103, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:06:42,174 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 229 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:42,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 126 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2022-02-16 14:06:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 2527. [2022-02-16 14:06:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.753760886777514) internal successors, (6956), 2526 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6956 transitions. [2022-02-16 14:06:42,224 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6956 transitions. Word has length 23 [2022-02-16 14:06:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:42,224 INFO L470 AbstractCegarLoop]: Abstraction has 2527 states and 6956 transitions. [2022-02-16 14:06:42,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6956 transitions. [2022-02-16 14:06:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:42,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:42,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:42,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:42,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:42,443 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 827486908, now seen corresponding path program 9 times [2022-02-16 14:06:42,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:42,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239768494] [2022-02-16 14:06:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:42,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:42,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:42,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239768494] [2022-02-16 14:06:42,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239768494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:42,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119884946] [2022-02-16 14:06:42,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:42,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:42,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:42,548 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) [2022-02-16 14:06:42,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 14:06:42,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:06:42,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:06:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:42,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:42,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119884946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:42,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:42,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-02-16 14:06:42,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437246092] [2022-02-16 14:06:42,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:42,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:06:42,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:06:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:42,808 INFO L87 Difference]: Start difference. First operand 2527 states and 6956 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:42,938 INFO L93 Difference]: Finished difference Result 2599 states and 7089 transitions. [2022-02-16 14:06:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:06:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:42,942 INFO L225 Difference]: With dead ends: 2599 [2022-02-16 14:06:42,942 INFO L226 Difference]: Without dead ends: 2578 [2022-02-16 14:06:42,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:06:42,943 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:42,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 128 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-02-16 14:06:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2552. [2022-02-16 14:06:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.7491179929439435) internal successors, (7013), 2551 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 7013 transitions. [2022-02-16 14:06:42,977 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 7013 transitions. Word has length 23 [2022-02-16 14:06:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:42,977 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 7013 transitions. [2022-02-16 14:06:42,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 7013 transitions. [2022-02-16 14:06:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:42,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:42,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:42,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:43,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-16 14:06:43,195 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:43,196 INFO L85 PathProgramCache]: Analyzing trace with hash 178402808, now seen corresponding path program 10 times [2022-02-16 14:06:43,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:43,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869904831] [2022-02-16 14:06:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:43,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:43,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:43,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869904831] [2022-02-16 14:06:43,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869904831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:43,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580232286] [2022-02-16 14:06:43,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:43,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:43,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:43,260 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) [2022-02-16 14:06:43,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 14:06:43,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:06:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:43,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:43,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580232286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:43,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:43,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 10 [2022-02-16 14:06:43,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847824408] [2022-02-16 14:06:43,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:43,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 14:06:43,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 14:06:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:06:43,483 INFO L87 Difference]: Start difference. First operand 2552 states and 7013 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:43,604 INFO L93 Difference]: Finished difference Result 2619 states and 7117 transitions. [2022-02-16 14:06:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 14:06:43,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:43,608 INFO L225 Difference]: With dead ends: 2619 [2022-02-16 14:06:43,608 INFO L226 Difference]: Without dead ends: 2596 [2022-02-16 14:06:43,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:43,608 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:43,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2022-02-16 14:06:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2554. [2022-02-16 14:06:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.7477477477477477) internal successors, (7015), 2553 states have internal predecessors, (7015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 7015 transitions. [2022-02-16 14:06:43,638 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 7015 transitions. Word has length 23 [2022-02-16 14:06:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:43,638 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 7015 transitions. [2022-02-16 14:06:43,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 7015 transitions. [2022-02-16 14:06:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:43,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:43,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:43,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:43,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:43,855 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash -316334814, now seen corresponding path program 11 times [2022-02-16 14:06:43,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:43,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408529713] [2022-02-16 14:06:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:43,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:43,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:43,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408529713] [2022-02-16 14:06:43,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408529713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:43,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434021407] [2022-02-16 14:06:43,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:43,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:43,950 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) [2022-02-16 14:06:43,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 14:06:43,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:06:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:06:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:44,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:44,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434021407] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:44,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:44,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-02-16 14:06:44,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789666101] [2022-02-16 14:06:44,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:44,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:06:44,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:44,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:06:44,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:06:44,185 INFO L87 Difference]: Start difference. First operand 2554 states and 7015 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:44,330 INFO L93 Difference]: Finished difference Result 2747 states and 7386 transitions. [2022-02-16 14:06:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 14:06:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:44,334 INFO L225 Difference]: With dead ends: 2747 [2022-02-16 14:06:44,334 INFO L226 Difference]: Without dead ends: 2713 [2022-02-16 14:06:44,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:44,335 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:44,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 161 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-02-16 14:06:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2650. [2022-02-16 14:06:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 2649 states have (on average 2.7346168365420915) internal successors, (7244), 2649 states have internal predecessors, (7244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 7244 transitions. [2022-02-16 14:06:44,365 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 7244 transitions. Word has length 23 [2022-02-16 14:06:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:44,365 INFO L470 AbstractCegarLoop]: Abstraction has 2650 states and 7244 transitions. [2022-02-16 14:06:44,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 7244 transitions. [2022-02-16 14:06:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:06:44,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:44,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:44,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:44,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:44,582 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash -821159372, now seen corresponding path program 12 times [2022-02-16 14:06:44,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:44,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400619048] [2022-02-16 14:06:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:44,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:44,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:44,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400619048] [2022-02-16 14:06:44,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400619048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:44,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567906451] [2022-02-16 14:06:44,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:44,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:44,667 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) [2022-02-16 14:06:44,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 14:06:44,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:06:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 14:06:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:44,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:44,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567906451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:44,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:44,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-02-16 14:06:44,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316012592] [2022-02-16 14:06:44,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:44,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:06:44,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:06:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:44,839 INFO L87 Difference]: Start difference. First operand 2650 states and 7244 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:44,990 INFO L93 Difference]: Finished difference Result 2809 states and 7524 transitions. [2022-02-16 14:06:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:06:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-16 14:06:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:44,994 INFO L225 Difference]: With dead ends: 2809 [2022-02-16 14:06:44,994 INFO L226 Difference]: Without dead ends: 2804 [2022-02-16 14:06:44,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:06:44,995 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:44,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 176 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-02-16 14:06:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2663. [2022-02-16 14:06:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 2.736288504883546) internal successors, (7284), 2662 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 7284 transitions. [2022-02-16 14:06:45,027 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 7284 transitions. Word has length 23 [2022-02-16 14:06:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:45,027 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 7284 transitions. [2022-02-16 14:06:45,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 7284 transitions. [2022-02-16 14:06:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:45,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:45,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:45,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:45,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-16 14:06:45,247 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1272252092, now seen corresponding path program 12 times [2022-02-16 14:06:45,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:45,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63107524] [2022-02-16 14:06:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:45,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:45,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:45,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63107524] [2022-02-16 14:06:45,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63107524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:45,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242062838] [2022-02-16 14:06:45,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:45,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:45,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:45,313 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) [2022-02-16 14:06:45,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 14:06:45,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:06:45,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:45,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:45,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:45,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242062838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:45,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:45,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-02-16 14:06:45,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681362553] [2022-02-16 14:06:45,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:06:45,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:06:45,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:06:45,617 INFO L87 Difference]: Start difference. First operand 2663 states and 7284 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:45,856 INFO L93 Difference]: Finished difference Result 3001 states and 7904 transitions. [2022-02-16 14:06:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:06:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:06:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:45,861 INFO L225 Difference]: With dead ends: 3001 [2022-02-16 14:06:45,861 INFO L226 Difference]: Without dead ends: 2996 [2022-02-16 14:06:45,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:45,862 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:45,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 265 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:06:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2022-02-16 14:06:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2836. [2022-02-16 14:06:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2835 states have (on average 2.7185185185185183) internal successors, (7707), 2835 states have internal predecessors, (7707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 7707 transitions. [2022-02-16 14:06:45,900 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 7707 transitions. Word has length 25 [2022-02-16 14:06:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:45,900 INFO L470 AbstractCegarLoop]: Abstraction has 2836 states and 7707 transitions. [2022-02-16 14:06:45,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 7707 transitions. [2022-02-16 14:06:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:45,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:45,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:45,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:46,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-16 14:06:46,110 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:46,110 INFO L85 PathProgramCache]: Analyzing trace with hash 591889536, now seen corresponding path program 13 times [2022-02-16 14:06:46,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:46,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761408716] [2022-02-16 14:06:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:46,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:46,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:46,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761408716] [2022-02-16 14:06:46,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761408716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:46,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290040526] [2022-02-16 14:06:46,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:46,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:46,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:46,182 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) [2022-02-16 14:06:46,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 14:06:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:46,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:46,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:46,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290040526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:46,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:46,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-16 14:06:46,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525842809] [2022-02-16 14:06:46,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:46,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:06:46,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:06:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:46,362 INFO L87 Difference]: Start difference. First operand 2836 states and 7707 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:46,509 INFO L93 Difference]: Finished difference Result 3183 states and 8364 transitions. [2022-02-16 14:06:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:06:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:06:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:46,514 INFO L225 Difference]: With dead ends: 3183 [2022-02-16 14:06:46,514 INFO L226 Difference]: Without dead ends: 3178 [2022-02-16 14:06:46,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:06:46,518 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:46,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 261 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2022-02-16 14:06:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 3027. [2022-02-16 14:06:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 2.7002643754130866) internal successors, (8171), 3026 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 8171 transitions. [2022-02-16 14:06:46,554 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 8171 transitions. Word has length 25 [2022-02-16 14:06:46,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:46,554 INFO L470 AbstractCegarLoop]: Abstraction has 3027 states and 8171 transitions. [2022-02-16 14:06:46,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 8171 transitions. [2022-02-16 14:06:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:46,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:46,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:46,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:46,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-16 14:06:46,774 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:46,774 INFO L85 PathProgramCache]: Analyzing trace with hash 786793746, now seen corresponding path program 14 times [2022-02-16 14:06:46,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:46,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865445542] [2022-02-16 14:06:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:46,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:46,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:46,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865445542] [2022-02-16 14:06:46,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865445542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:46,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827460456] [2022-02-16 14:06:46,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:46,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:46,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:46,898 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) [2022-02-16 14:06:46,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 14:06:46,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:46,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:46,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:46,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:47,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:47,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827460456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:47,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:47,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-02-16 14:06:47,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702020652] [2022-02-16 14:06:47,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:47,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:06:47,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:47,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:06:47,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:06:47,099 INFO L87 Difference]: Start difference. First operand 3027 states and 8171 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:47,229 INFO L93 Difference]: Finished difference Result 3113 states and 8303 transitions. [2022-02-16 14:06:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 14:06:47,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:06:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:47,234 INFO L225 Difference]: With dead ends: 3113 [2022-02-16 14:06:47,235 INFO L226 Difference]: Without dead ends: 3108 [2022-02-16 14:06:47,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:06:47,235 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:47,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 180 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2022-02-16 14:06:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 3028. [2022-02-16 14:06:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 2.700693756194252) internal successors, (8175), 3027 states have internal predecessors, (8175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 8175 transitions. [2022-02-16 14:06:47,274 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 8175 transitions. Word has length 25 [2022-02-16 14:06:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:47,275 INFO L470 AbstractCegarLoop]: Abstraction has 3028 states and 8175 transitions. [2022-02-16 14:06:47,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 8175 transitions. [2022-02-16 14:06:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:47,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:47,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:47,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-16 14:06:47,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-16 14:06:47,488 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:47,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1740173764, now seen corresponding path program 15 times [2022-02-16 14:06:47,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:47,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731299934] [2022-02-16 14:06:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:47,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:47,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:47,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731299934] [2022-02-16 14:06:47,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731299934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:47,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873647893] [2022-02-16 14:06:47,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:47,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:47,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:47,576 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) [2022-02-16 14:06:47,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 14:06:47,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:06:47,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:47,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:47,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873647893] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:47,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:47,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-16 14:06:47,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977398866] [2022-02-16 14:06:47,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:47,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:06:47,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:06:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:47,822 INFO L87 Difference]: Start difference. First operand 3028 states and 8175 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2022-02-16 14:06:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:48,053 INFO L93 Difference]: Finished difference Result 3259 states and 8547 transitions. [2022-02-16 14:06:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:06:48,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2022-02-16 14:06:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:48,058 INFO L225 Difference]: With dead ends: 3259 [2022-02-16 14:06:48,058 INFO L226 Difference]: Without dead ends: 3227 [2022-02-16 14:06:48,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:06:48,061 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 92 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:48,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 239 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-02-16 14:06:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3010. [2022-02-16 14:06:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.6982386174808908) internal successors, (8119), 3009 states have internal predecessors, (8119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8119 transitions. [2022-02-16 14:06:48,096 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8119 transitions. Word has length 25 [2022-02-16 14:06:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:48,097 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 8119 transitions. [2022-02-16 14:06:48,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2022-02-16 14:06:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8119 transitions. [2022-02-16 14:06:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:48,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:48,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:48,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:48,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-16 14:06:48,316 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:48,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1235349206, now seen corresponding path program 16 times [2022-02-16 14:06:48,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:48,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066670270] [2022-02-16 14:06:48,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:48,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:48,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:48,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066670270] [2022-02-16 14:06:48,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066670270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:48,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269798550] [2022-02-16 14:06:48,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:48,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:48,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:48,421 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) [2022-02-16 14:06:48,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 14:06:48,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:48,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:48,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:48,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:48,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269798550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:48,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:48,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-02-16 14:06:48,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523659761] [2022-02-16 14:06:48,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:48,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:06:48,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:06:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:06:48,632 INFO L87 Difference]: Start difference. First operand 3010 states and 8119 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:48,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:48,778 INFO L93 Difference]: Finished difference Result 3127 states and 8286 transitions. [2022-02-16 14:06:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:06:48,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:06:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:48,782 INFO L225 Difference]: With dead ends: 3127 [2022-02-16 14:06:48,783 INFO L226 Difference]: Without dead ends: 3122 [2022-02-16 14:06:48,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:48,783 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:48,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 142 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2022-02-16 14:06:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3010. [2022-02-16 14:06:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.6992356264539716) internal successors, (8122), 3009 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8122 transitions. [2022-02-16 14:06:48,816 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8122 transitions. Word has length 25 [2022-02-16 14:06:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:48,816 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 8122 transitions. [2022-02-16 14:06:48,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8122 transitions. [2022-02-16 14:06:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:48,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:48,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:48,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:49,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-16 14:06:49,035 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1063979588, now seen corresponding path program 17 times [2022-02-16 14:06:49,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:49,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615458031] [2022-02-16 14:06:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:49,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:06:49,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:49,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615458031] [2022-02-16 14:06:49,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615458031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:49,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450357959] [2022-02-16 14:06:49,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:49,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:49,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:49,152 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) [2022-02-16 14:06:49,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 14:06:49,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:06:49,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:49,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:06:49,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:06:49,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450357959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:49,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:49,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-16 14:06:49,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070156973] [2022-02-16 14:06:49,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:49,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:06:49,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:06:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:06:49,539 INFO L87 Difference]: Start difference. First operand 3010 states and 8122 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2022-02-16 14:06:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:49,815 INFO L93 Difference]: Finished difference Result 3055 states and 8172 transitions. [2022-02-16 14:06:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:06:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 25 [2022-02-16 14:06:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:49,820 INFO L225 Difference]: With dead ends: 3055 [2022-02-16 14:06:49,820 INFO L226 Difference]: Without dead ends: 3035 [2022-02-16 14:06:49,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:06:49,821 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:49,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 179 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2022-02-16 14:06:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3007. [2022-02-16 14:06:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 2.6979374584165003) internal successors, (8110), 3006 states have internal predecessors, (8110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 8110 transitions. [2022-02-16 14:06:49,860 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 8110 transitions. Word has length 25 [2022-02-16 14:06:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:49,860 INFO L470 AbstractCegarLoop]: Abstraction has 3007 states and 8110 transitions. [2022-02-16 14:06:49,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2022-02-16 14:06:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 8110 transitions. [2022-02-16 14:06:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:49,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:49,864 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:49,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-16 14:06:50,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-16 14:06:50,070 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash -953053930, now seen corresponding path program 18 times [2022-02-16 14:06:50,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:50,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997816571] [2022-02-16 14:06:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:50,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:50,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:50,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997816571] [2022-02-16 14:06:50,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997816571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:50,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558290806] [2022-02-16 14:06:50,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:06:50,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:50,159 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) [2022-02-16 14:06:50,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 14:06:50,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:06:50,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:50,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:50,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:50,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:50,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558290806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:50,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:50,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-16 14:06:50,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094462239] [2022-02-16 14:06:50,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:50,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:06:50,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:50,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:06:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:06:50,434 INFO L87 Difference]: Start difference. First operand 3007 states and 8110 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-02-16 14:06:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:50,677 INFO L93 Difference]: Finished difference Result 3123 states and 8276 transitions. [2022-02-16 14:06:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:06:50,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2022-02-16 14:06:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:50,682 INFO L225 Difference]: With dead ends: 3123 [2022-02-16 14:06:50,683 INFO L226 Difference]: Without dead ends: 3118 [2022-02-16 14:06:50,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:50,683 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:50,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 182 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2022-02-16 14:06:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 3009. [2022-02-16 14:06:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.6988031914893615) internal successors, (8118), 3008 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8118 transitions. [2022-02-16 14:06:50,722 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8118 transitions. Word has length 25 [2022-02-16 14:06:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 3009 states and 8118 transitions. [2022-02-16 14:06:50,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2022-02-16 14:06:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8118 transitions. [2022-02-16 14:06:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:50,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:50,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:50,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-16 14:06:50,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-16 14:06:50,928 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 527095642, now seen corresponding path program 10 times [2022-02-16 14:06:50,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:50,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123090298] [2022-02-16 14:06:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:50,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:50,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:50,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123090298] [2022-02-16 14:06:50,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123090298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:50,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124182428] [2022-02-16 14:06:50,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:50,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:50,982 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) [2022-02-16 14:06:50,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 14:06:51,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:51,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:51,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:06:51,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:51,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:51,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124182428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:51,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:51,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-16 14:06:51,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258507592] [2022-02-16 14:06:51,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:51,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:06:51,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:06:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:06:51,200 INFO L87 Difference]: Start difference. First operand 3009 states and 8118 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:51,568 INFO L93 Difference]: Finished difference Result 10663 states and 29508 transitions. [2022-02-16 14:06:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:06:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:06:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:51,587 INFO L225 Difference]: With dead ends: 10663 [2022-02-16 14:06:51,587 INFO L226 Difference]: Without dead ends: 10663 [2022-02-16 14:06:51,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=859, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:06:51,588 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 183 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:51,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 67 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:06:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2022-02-16 14:06:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 5899. [2022-02-16 14:06:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5899 states, 5898 states have (on average 2.7119362495761274) internal successors, (15995), 5898 states have internal predecessors, (15995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 15995 transitions. [2022-02-16 14:06:51,703 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 15995 transitions. Word has length 25 [2022-02-16 14:06:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 5899 states and 15995 transitions. [2022-02-16 14:06:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 15995 transitions. [2022-02-16 14:06:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:51,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:51,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:51,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-16 14:06:51,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:51,927 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash 555083102, now seen corresponding path program 19 times [2022-02-16 14:06:51,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:51,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521137004] [2022-02-16 14:06:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:51,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:51,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:51,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521137004] [2022-02-16 14:06:51,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521137004] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:51,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488403814] [2022-02-16 14:06:51,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:06:51,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:51,994 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) [2022-02-16 14:06:51,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 14:06:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:52,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:06:52,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:52,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:52,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488403814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:52,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:52,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-02-16 14:06:52,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306017164] [2022-02-16 14:06:52,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:52,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:06:52,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:06:52,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:06:52,213 INFO L87 Difference]: Start difference. First operand 5899 states and 15995 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:52,405 INFO L93 Difference]: Finished difference Result 6157 states and 16490 transitions. [2022-02-16 14:06:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:06:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:06:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:52,419 INFO L225 Difference]: With dead ends: 6157 [2022-02-16 14:06:52,419 INFO L226 Difference]: Without dead ends: 6152 [2022-02-16 14:06:52,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:06:52,420 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:52,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 189 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:06:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2022-02-16 14:06:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 5999. [2022-02-16 14:06:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5999 states, 5998 states have (on average 2.709403134378126) internal successors, (16251), 5998 states have internal predecessors, (16251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5999 states to 5999 states and 16251 transitions. [2022-02-16 14:06:52,505 INFO L78 Accepts]: Start accepts. Automaton has 5999 states and 16251 transitions. Word has length 25 [2022-02-16 14:06:52,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:52,505 INFO L470 AbstractCegarLoop]: Abstraction has 5999 states and 16251 transitions. [2022-02-16 14:06:52,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5999 states and 16251 transitions. [2022-02-16 14:06:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:52,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:52,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:52,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:52,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:52,727 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash -354173082, now seen corresponding path program 20 times [2022-02-16 14:06:52,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:52,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615171259] [2022-02-16 14:06:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:52,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:52,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:52,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615171259] [2022-02-16 14:06:52,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615171259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:52,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998792109] [2022-02-16 14:06:52,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:06:52,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:52,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:52,816 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) [2022-02-16 14:06:52,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 14:06:52,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:06:52,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:52,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:06:52,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:53,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:53,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998792109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:53,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:53,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:06:53,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670897562] [2022-02-16 14:06:53,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:53,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:06:53,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:06:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:06:53,340 INFO L87 Difference]: Start difference. First operand 5999 states and 16251 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:53,885 INFO L93 Difference]: Finished difference Result 6434 states and 17020 transitions. [2022-02-16 14:06:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 14:06:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:06:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:53,896 INFO L225 Difference]: With dead ends: 6434 [2022-02-16 14:06:53,896 INFO L226 Difference]: Without dead ends: 6419 [2022-02-16 14:06:53,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:06:53,897 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:53,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 154 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 489 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-02-16 14:06:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6419 states. [2022-02-16 14:06:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6419 to 6083. [2022-02-16 14:06:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 2.7024005261427164) internal successors, (16436), 6082 states have internal predecessors, (16436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 16436 transitions. [2022-02-16 14:06:53,987 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 16436 transitions. Word has length 25 [2022-02-16 14:06:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:53,987 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 16436 transitions. [2022-02-16 14:06:53,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 16436 transitions. [2022-02-16 14:06:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:53,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:53,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:54,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-16 14:06:54,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-16 14:06:54,211 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1509968546, now seen corresponding path program 21 times [2022-02-16 14:06:54,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:54,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105667652] [2022-02-16 14:06:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:54,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:54,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:54,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105667652] [2022-02-16 14:06:54,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105667652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:54,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178915475] [2022-02-16 14:06:54,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:06:54,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:54,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:54,296 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) [2022-02-16 14:06:54,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 14:06:54,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:06:54,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:06:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:54,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:54,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178915475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:54,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:54,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:06:54,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853612088] [2022-02-16 14:06:54,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:54,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:06:54,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:06:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:54,762 INFO L87 Difference]: Start difference. First operand 6083 states and 16436 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-02-16 14:06:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:56,312 INFO L93 Difference]: Finished difference Result 6505 states and 17091 transitions. [2022-02-16 14:06:56,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:06:56,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 25 [2022-02-16 14:06:56,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:56,323 INFO L225 Difference]: With dead ends: 6505 [2022-02-16 14:06:56,323 INFO L226 Difference]: Without dead ends: 6468 [2022-02-16 14:06:56,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=2562, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:06:56,325 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 165 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:56,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 123 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:06:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2022-02-16 14:06:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 6142. [2022-02-16 14:06:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 2.7000488519785053) internal successors, (16581), 6141 states have internal predecessors, (16581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 16581 transitions. [2022-02-16 14:06:56,417 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 16581 transitions. Word has length 25 [2022-02-16 14:06:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:56,417 INFO L470 AbstractCegarLoop]: Abstraction has 6142 states and 16581 transitions. [2022-02-16 14:06:56,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-02-16 14:06:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 16581 transitions. [2022-02-16 14:06:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:56,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:56,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:56,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:56,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-16 14:06:56,641 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1948710622, now seen corresponding path program 22 times [2022-02-16 14:06:56,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:56,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624104585] [2022-02-16 14:06:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:56,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:56,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:56,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624104585] [2022-02-16 14:06:56,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624104585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:56,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856414000] [2022-02-16 14:06:56,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:06:56,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:56,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:56,732 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) [2022-02-16 14:06:56,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 14:06:56,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:06:56,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:06:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:57,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856414000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:57,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:57,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:06:57,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411146647] [2022-02-16 14:06:57,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:57,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:06:57,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:57,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:06:57,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:57,173 INFO L87 Difference]: Start difference. First operand 6142 states and 16581 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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) [2022-02-16 14:06:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:06:58,696 INFO L93 Difference]: Finished difference Result 6820 states and 17789 transitions. [2022-02-16 14:06:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-16 14:06:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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 25 [2022-02-16 14:06:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:06:58,709 INFO L225 Difference]: With dead ends: 6820 [2022-02-16 14:06:58,709 INFO L226 Difference]: Without dead ends: 6769 [2022-02-16 14:06:58,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=664, Invalid=2642, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:06:58,714 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 168 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:06:58,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 165 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:06:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2022-02-16 14:06:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6309. [2022-02-16 14:06:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6309 states, 6308 states have (on average 2.698161065313887) internal successors, (17020), 6308 states have internal predecessors, (17020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:06:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6309 states to 6309 states and 17020 transitions. [2022-02-16 14:06:58,812 INFO L78 Accepts]: Start accepts. Automaton has 6309 states and 17020 transitions. Word has length 25 [2022-02-16 14:06:58,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:06:58,812 INFO L470 AbstractCegarLoop]: Abstraction has 6309 states and 17020 transitions. [2022-02-16 14:06:58,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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) [2022-02-16 14:06:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6309 states and 17020 transitions. [2022-02-16 14:06:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:06:58,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:06:58,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:06:58,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-16 14:06:59,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-16 14:06:59,035 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:06:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:06:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1704872756, now seen corresponding path program 23 times [2022-02-16 14:06:59,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:06:59,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721101259] [2022-02-16 14:06:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:06:59,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:06:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:06:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:59,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:06:59,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721101259] [2022-02-16 14:06:59,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721101259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:06:59,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104253854] [2022-02-16 14:06:59,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:06:59,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:06:59,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:06:59,134 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) [2022-02-16 14:06:59,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 14:06:59,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:06:59,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:06:59,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:06:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:06:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:59,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:06:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:06:59,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104253854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:06:59,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:06:59,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:06:59,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318910782] [2022-02-16 14:06:59,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:06:59,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:06:59,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:06:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:06:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:06:59,616 INFO L87 Difference]: Start difference. First operand 6309 states and 17020 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-02-16 14:07:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:00,367 INFO L93 Difference]: Finished difference Result 6457 states and 17222 transitions. [2022-02-16 14:07:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:07:00,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 25 [2022-02-16 14:07:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:00,379 INFO L225 Difference]: With dead ends: 6457 [2022-02-16 14:07:00,379 INFO L226 Difference]: Without dead ends: 6452 [2022-02-16 14:07:00,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:07:00,380 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:00,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 136 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:07:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2022-02-16 14:07:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 6309. [2022-02-16 14:07:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6309 states, 6308 states have (on average 2.6984781230183894) internal successors, (17022), 6308 states have internal predecessors, (17022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6309 states to 6309 states and 17022 transitions. [2022-02-16 14:07:00,480 INFO L78 Accepts]: Start accepts. Automaton has 6309 states and 17022 transitions. Word has length 25 [2022-02-16 14:07:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:00,481 INFO L470 AbstractCegarLoop]: Abstraction has 6309 states and 17022 transitions. [2022-02-16 14:07:00,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-02-16 14:07:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6309 states and 17022 transitions. [2022-02-16 14:07:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:00,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:00,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:00,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:00,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:00,697 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash -407256538, now seen corresponding path program 24 times [2022-02-16 14:07:00,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:00,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536152861] [2022-02-16 14:07:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:00,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:00,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:00,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536152861] [2022-02-16 14:07:00,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536152861] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:00,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554317269] [2022-02-16 14:07:00,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:00,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:00,792 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) [2022-02-16 14:07:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 14:07:00,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:07:00,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:01,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:01,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554317269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:01,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:01,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:07:01,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740750848] [2022-02-16 14:07:01,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:01,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:01,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:01,274 INFO L87 Difference]: Start difference. First operand 6309 states and 17022 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:02,200 INFO L93 Difference]: Finished difference Result 6662 states and 17575 transitions. [2022-02-16 14:07:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-16 14:07:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:02,211 INFO L225 Difference]: With dead ends: 6662 [2022-02-16 14:07:02,211 INFO L226 Difference]: Without dead ends: 6640 [2022-02-16 14:07:02,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:07:02,212 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:02,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 121 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:07:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2022-02-16 14:07:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 6303. [2022-02-16 14:07:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 6302 states have (on average 2.699936528086322) internal successors, (17015), 6302 states have internal predecessors, (17015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 17015 transitions. [2022-02-16 14:07:02,297 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 17015 transitions. Word has length 25 [2022-02-16 14:07:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:02,297 INFO L470 AbstractCegarLoop]: Abstraction has 6303 states and 17015 transitions. [2022-02-16 14:07:02,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 17015 transitions. [2022-02-16 14:07:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:02,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:02,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:02,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:02,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-16 14:07:02,520 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:02,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1512060706, now seen corresponding path program 25 times [2022-02-16 14:07:02,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:02,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682754667] [2022-02-16 14:07:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:02,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:02,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:02,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682754667] [2022-02-16 14:07:02,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682754667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:02,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652831078] [2022-02-16 14:07:02,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:02,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:02,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:02,635 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) [2022-02-16 14:07:02,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 14:07:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:02,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:02,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:02,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:03,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652831078] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:03,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:03,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:07:03,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244047994] [2022-02-16 14:07:03,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:03,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:03,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:03,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:03,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:03,156 INFO L87 Difference]: Start difference. First operand 6303 states and 17015 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:04,228 INFO L93 Difference]: Finished difference Result 6678 states and 17658 transitions. [2022-02-16 14:07:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:07:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:04,239 INFO L225 Difference]: With dead ends: 6678 [2022-02-16 14:07:04,239 INFO L226 Difference]: Without dead ends: 6637 [2022-02-16 14:07:04,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=412, Invalid=1658, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:07:04,240 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 158 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:04,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 123 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6637 states. [2022-02-16 14:07:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6637 to 6413. [2022-02-16 14:07:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6413 states, 6412 states have (on average 2.6927635683094198) internal successors, (17266), 6412 states have internal predecessors, (17266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 17266 transitions. [2022-02-16 14:07:04,324 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 17266 transitions. Word has length 25 [2022-02-16 14:07:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:04,324 INFO L470 AbstractCegarLoop]: Abstraction has 6413 states and 17266 transitions. [2022-02-16 14:07:04,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 17266 transitions. [2022-02-16 14:07:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:04,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:04,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:04,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:04,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:04,540 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash -918764962, now seen corresponding path program 26 times [2022-02-16 14:07:04,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:04,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772437528] [2022-02-16 14:07:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:04,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:04,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:04,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772437528] [2022-02-16 14:07:04,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772437528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:04,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089734005] [2022-02-16 14:07:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:04,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:04,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:04,648 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) [2022-02-16 14:07:04,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 14:07:04,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:04,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:04,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:04,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:04,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:05,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089734005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:05,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:05,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:07:05,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110107395] [2022-02-16 14:07:05,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:05,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:07:05,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:05,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:07:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:07:05,208 INFO L87 Difference]: Start difference. First operand 6413 states and 17266 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-02-16 14:07:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:06,400 INFO L93 Difference]: Finished difference Result 6830 states and 17979 transitions. [2022-02-16 14:07:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:07:06,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 25 [2022-02-16 14:07:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:06,413 INFO L225 Difference]: With dead ends: 6830 [2022-02-16 14:07:06,413 INFO L226 Difference]: Without dead ends: 6794 [2022-02-16 14:07:06,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=518, Invalid=2032, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 14:07:06,414 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:06,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 97 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2022-02-16 14:07:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 6536. [2022-02-16 14:07:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 2.691201224177506) internal successors, (17587), 6535 states have internal predecessors, (17587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 17587 transitions. [2022-02-16 14:07:06,507 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 17587 transitions. Word has length 25 [2022-02-16 14:07:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:06,507 INFO L470 AbstractCegarLoop]: Abstraction has 6536 states and 17587 transitions. [2022-02-16 14:07:06,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-02-16 14:07:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 17587 transitions. [2022-02-16 14:07:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:06,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:06,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:06,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:06,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-16 14:07:06,731 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1007236148, now seen corresponding path program 27 times [2022-02-16 14:07:06,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:06,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555856971] [2022-02-16 14:07:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:06,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:06,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:06,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555856971] [2022-02-16 14:07:06,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555856971] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:06,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569861459] [2022-02-16 14:07:06,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:07:06,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:06,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:06,816 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) [2022-02-16 14:07:06,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 14:07:06,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:07:06,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:06,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:06,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:07,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:07,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569861459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:07,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:07,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:07:07,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448438873] [2022-02-16 14:07:07,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:07,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:07:07,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:07:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:07:07,277 INFO L87 Difference]: Start difference. First operand 6536 states and 17587 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:07,903 INFO L93 Difference]: Finished difference Result 6951 states and 18257 transitions. [2022-02-16 14:07:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:07:07,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:07,913 INFO L225 Difference]: With dead ends: 6951 [2022-02-16 14:07:07,914 INFO L226 Difference]: Without dead ends: 6946 [2022-02-16 14:07:07,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:07:07,914 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 143 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:07,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 125 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6946 states. [2022-02-16 14:07:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6946 to 6550. [2022-02-16 14:07:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6550 states, 6549 states have (on average 2.692777523285998) internal successors, (17635), 6549 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6550 states to 6550 states and 17635 transitions. [2022-02-16 14:07:08,043 INFO L78 Accepts]: Start accepts. Automaton has 6550 states and 17635 transitions. Word has length 25 [2022-02-16 14:07:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:08,043 INFO L470 AbstractCegarLoop]: Abstraction has 6550 states and 17635 transitions. [2022-02-16 14:07:08,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6550 states and 17635 transitions. [2022-02-16 14:07:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:08,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:08,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:08,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-16 14:07:08,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-16 14:07:08,266 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:08,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1739624994, now seen corresponding path program 28 times [2022-02-16 14:07:08,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:08,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756985164] [2022-02-16 14:07:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:08,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:08,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:08,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756985164] [2022-02-16 14:07:08,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756985164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:08,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870168455] [2022-02-16 14:07:08,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:07:08,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:08,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:08,363 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) [2022-02-16 14:07:08,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 14:07:08,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:07:08,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:08,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:08,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:08,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870168455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:08,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:08,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:07:08,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706401766] [2022-02-16 14:07:08,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:08,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:08,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:08,923 INFO L87 Difference]: Start difference. First operand 6550 states and 17635 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:10,099 INFO L93 Difference]: Finished difference Result 6823 states and 18070 transitions. [2022-02-16 14:07:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 14:07:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:10,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:10,111 INFO L225 Difference]: With dead ends: 6823 [2022-02-16 14:07:10,112 INFO L226 Difference]: Without dead ends: 6766 [2022-02-16 14:07:10,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=392, Invalid=1678, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:07:10,112 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:10,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 121 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:07:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2022-02-16 14:07:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 6593. [2022-02-16 14:07:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6593 states, 6592 states have (on average 2.6914441747572817) internal successors, (17742), 6592 states have internal predecessors, (17742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6593 states to 6593 states and 17742 transitions. [2022-02-16 14:07:10,214 INFO L78 Accepts]: Start accepts. Automaton has 6593 states and 17742 transitions. Word has length 25 [2022-02-16 14:07:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:10,214 INFO L470 AbstractCegarLoop]: Abstraction has 6593 states and 17742 transitions. [2022-02-16 14:07:10,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6593 states and 17742 transitions. [2022-02-16 14:07:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:10,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:10,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:10,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:10,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:10,438 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1377459508, now seen corresponding path program 29 times [2022-02-16 14:07:10,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:10,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260272610] [2022-02-16 14:07:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:10,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:10,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:10,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260272610] [2022-02-16 14:07:10,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260272610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:10,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776853661] [2022-02-16 14:07:10,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:07:10,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:10,525 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) [2022-02-16 14:07:10,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 14:07:10,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:07:10,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:10,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:10,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:11,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776853661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:11,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:11,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:07:11,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57577917] [2022-02-16 14:07:11,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:11,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:07:11,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:07:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:07:11,106 INFO L87 Difference]: Start difference. First operand 6593 states and 17742 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:07:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:11,963 INFO L93 Difference]: Finished difference Result 6780 states and 18006 transitions. [2022-02-16 14:07:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:07:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 25 [2022-02-16 14:07:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:11,975 INFO L225 Difference]: With dead ends: 6780 [2022-02-16 14:07:11,975 INFO L226 Difference]: Without dead ends: 6768 [2022-02-16 14:07:11,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:07:11,976 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:11,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 161 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:07:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2022-02-16 14:07:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6594. [2022-02-16 14:07:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6594 states, 6593 states have (on average 2.6914909752768086) internal successors, (17745), 6593 states have internal predecessors, (17745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6594 states to 6594 states and 17745 transitions. [2022-02-16 14:07:12,073 INFO L78 Accepts]: Start accepts. Automaton has 6594 states and 17745 transitions. Word has length 25 [2022-02-16 14:07:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:12,074 INFO L470 AbstractCegarLoop]: Abstraction has 6594 states and 17745 transitions. [2022-02-16 14:07:12,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:07:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6594 states and 17745 transitions. [2022-02-16 14:07:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:12,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:12,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:12,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-16 14:07:12,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-16 14:07:12,298 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash -597572044, now seen corresponding path program 30 times [2022-02-16 14:07:12,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:12,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864814666] [2022-02-16 14:07:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:12,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:12,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:12,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864814666] [2022-02-16 14:07:12,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864814666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:12,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614043770] [2022-02-16 14:07:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:12,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:12,416 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) [2022-02-16 14:07:12,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 14:07:12,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:07:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:12,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:13,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614043770] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:13,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:13,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 14:07:13,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784858955] [2022-02-16 14:07:13,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:13,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:07:13,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:07:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:07:13,005 INFO L87 Difference]: Start difference. First operand 6594 states and 17745 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2022-02-16 14:07:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:13,626 INFO L93 Difference]: Finished difference Result 6759 states and 18006 transitions. [2022-02-16 14:07:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 14:07:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 25 [2022-02-16 14:07:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:13,638 INFO L225 Difference]: With dead ends: 6759 [2022-02-16 14:07:13,638 INFO L226 Difference]: Without dead ends: 6754 [2022-02-16 14:07:13,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:07:13,639 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:13,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 124 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:07:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6754 states. [2022-02-16 14:07:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6754 to 6601. [2022-02-16 14:07:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6601 states, 6600 states have (on average 2.6913636363636364) internal successors, (17763), 6600 states have internal predecessors, (17763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6601 states to 6601 states and 17763 transitions. [2022-02-16 14:07:13,735 INFO L78 Accepts]: Start accepts. Automaton has 6601 states and 17763 transitions. Word has length 25 [2022-02-16 14:07:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:13,735 INFO L470 AbstractCegarLoop]: Abstraction has 6601 states and 17763 transitions. [2022-02-16 14:07:13,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2022-02-16 14:07:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6601 states and 17763 transitions. [2022-02-16 14:07:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:13,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:13,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:13,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:13,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-16 14:07:13,960 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -390764078, now seen corresponding path program 31 times [2022-02-16 14:07:13,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:13,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132686500] [2022-02-16 14:07:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:13,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:14,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:14,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132686500] [2022-02-16 14:07:14,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132686500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:14,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935038512] [2022-02-16 14:07:14,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:14,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:14,102 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) [2022-02-16 14:07:14,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-16 14:07:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:14,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:14,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935038512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:14,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:14,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 14:07:14,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410119073] [2022-02-16 14:07:14,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:14,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:07:14,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:14,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:07:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:07:14,499 INFO L87 Difference]: Start difference. First operand 6601 states and 17763 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:14,952 INFO L93 Difference]: Finished difference Result 6962 states and 18511 transitions. [2022-02-16 14:07:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:07:14,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:14,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:14,965 INFO L225 Difference]: With dead ends: 6962 [2022-02-16 14:07:14,965 INFO L226 Difference]: Without dead ends: 6957 [2022-02-16 14:07:14,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:07:14,966 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:14,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 141 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 554 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-02-16 14:07:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2022-02-16 14:07:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 6805. [2022-02-16 14:07:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6805 states, 6804 states have (on average 2.683862433862434) internal successors, (18261), 6804 states have internal predecessors, (18261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6805 states to 6805 states and 18261 transitions. [2022-02-16 14:07:15,071 INFO L78 Accepts]: Start accepts. Automaton has 6805 states and 18261 transitions. Word has length 25 [2022-02-16 14:07:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:15,072 INFO L470 AbstractCegarLoop]: Abstraction has 6805 states and 18261 transitions. [2022-02-16 14:07:15,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6805 states and 18261 transitions. [2022-02-16 14:07:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:15,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:15,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:15,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-16 14:07:15,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:15,295 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:15,296 INFO L85 PathProgramCache]: Analyzing trace with hash 617275606, now seen corresponding path program 32 times [2022-02-16 14:07:15,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:15,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130587404] [2022-02-16 14:07:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:15,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:15,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:15,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130587404] [2022-02-16 14:07:15,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130587404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:15,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779753423] [2022-02-16 14:07:15,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:15,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:15,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:15,427 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) [2022-02-16 14:07:15,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-16 14:07:15,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:15,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 14:07:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:15,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:16,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779753423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:16,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:16,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-16 14:07:16,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761117331] [2022-02-16 14:07:16,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:16,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:07:16,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:16,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:07:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:07:16,130 INFO L87 Difference]: Start difference. First operand 6805 states and 18261 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:18,769 INFO L93 Difference]: Finished difference Result 9604 states and 25279 transitions. [2022-02-16 14:07:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-16 14:07:18,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:18,787 INFO L225 Difference]: With dead ends: 9604 [2022-02-16 14:07:18,787 INFO L226 Difference]: Without dead ends: 9522 [2022-02-16 14:07:18,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1112, Invalid=4438, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:07:18,788 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 543 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:18,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 307 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 945 Invalid, 0 Unknown, 130 Unchecked, 0.5s Time] [2022-02-16 14:07:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2022-02-16 14:07:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 7013. [2022-02-16 14:07:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7013 states, 7012 states have (on average 2.6858243011979464) internal successors, (18833), 7012 states have internal predecessors, (18833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7013 states to 7013 states and 18833 transitions. [2022-02-16 14:07:18,925 INFO L78 Accepts]: Start accepts. Automaton has 7013 states and 18833 transitions. Word has length 25 [2022-02-16 14:07:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:18,925 INFO L470 AbstractCegarLoop]: Abstraction has 7013 states and 18833 transitions. [2022-02-16 14:07:18,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7013 states and 18833 transitions. [2022-02-16 14:07:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:18,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:18,972 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:18,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:19,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:19,172 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1743548078, now seen corresponding path program 33 times [2022-02-16 14:07:19,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:19,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307380538] [2022-02-16 14:07:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:19,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:19,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:19,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307380538] [2022-02-16 14:07:19,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307380538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:19,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281289093] [2022-02-16 14:07:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:07:19,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:19,272 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) [2022-02-16 14:07:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-16 14:07:19,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:07:19,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 14:07:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:19,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:19,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281289093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:19,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:19,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-02-16 14:07:19,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373005959] [2022-02-16 14:07:19,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:19,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:19,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:19,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:19,667 INFO L87 Difference]: Start difference. First operand 7013 states and 18833 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-02-16 14:07:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:20,050 INFO L93 Difference]: Finished difference Result 7312 states and 19446 transitions. [2022-02-16 14:07:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:07:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 25 [2022-02-16 14:07:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:20,062 INFO L225 Difference]: With dead ends: 7312 [2022-02-16 14:07:20,063 INFO L226 Difference]: Without dead ends: 7302 [2022-02-16 14:07:20,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:07:20,063 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:20,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 141 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 405 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-02-16 14:07:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7302 states. [2022-02-16 14:07:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7302 to 7078. [2022-02-16 14:07:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 2.6848947294051153) internal successors, (19001), 7077 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 19001 transitions. [2022-02-16 14:07:20,166 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 19001 transitions. Word has length 25 [2022-02-16 14:07:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:20,166 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 19001 transitions. [2022-02-16 14:07:20,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-02-16 14:07:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 19001 transitions. [2022-02-16 14:07:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:20,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:20,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:20,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-16 14:07:20,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:20,391 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1076890730, now seen corresponding path program 34 times [2022-02-16 14:07:20,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:20,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852605966] [2022-02-16 14:07:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:20,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:20,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:20,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852605966] [2022-02-16 14:07:20,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852605966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:20,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506944784] [2022-02-16 14:07:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:07:20,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:20,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:20,489 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) [2022-02-16 14:07:20,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-16 14:07:20,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:07:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:20,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:20,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:20,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:20,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506944784] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:20,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:20,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 14:07:20,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145651118] [2022-02-16 14:07:20,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:20,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:07:20,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:07:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:07:20,991 INFO L87 Difference]: Start difference. First operand 7078 states and 19001 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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) [2022-02-16 14:07:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:21,346 INFO L93 Difference]: Finished difference Result 7200 states and 19186 transitions. [2022-02-16 14:07:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:07:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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 25 [2022-02-16 14:07:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:21,358 INFO L225 Difference]: With dead ends: 7200 [2022-02-16 14:07:21,358 INFO L226 Difference]: Without dead ends: 7188 [2022-02-16 14:07:21,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:07:21,359 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:21,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 104 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 386 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-02-16 14:07:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7188 states. [2022-02-16 14:07:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7188 to 7080. [2022-02-16 14:07:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 7079 states have (on average 2.6841361774261903) internal successors, (19001), 7079 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 19001 transitions. [2022-02-16 14:07:21,456 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 19001 transitions. Word has length 25 [2022-02-16 14:07:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:21,456 INFO L470 AbstractCegarLoop]: Abstraction has 7080 states and 19001 transitions. [2022-02-16 14:07:21,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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) [2022-02-16 14:07:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 19001 transitions. [2022-02-16 14:07:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:21,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:21,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:21,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-16 14:07:21,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-16 14:07:21,681 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1515589798, now seen corresponding path program 35 times [2022-02-16 14:07:21,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:21,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353891183] [2022-02-16 14:07:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:21,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:21,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:21,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353891183] [2022-02-16 14:07:21,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353891183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:21,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418505304] [2022-02-16 14:07:21,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:07:21,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:21,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:21,774 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) [2022-02-16 14:07:21,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-16 14:07:21,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:07:21,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:21,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:22,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418505304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:22,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:22,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:07:22,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317491903] [2022-02-16 14:07:22,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:22,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:22,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:22,253 INFO L87 Difference]: Start difference. First operand 7080 states and 19001 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:22,522 INFO L93 Difference]: Finished difference Result 7197 states and 19225 transitions. [2022-02-16 14:07:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:07:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:22,533 INFO L225 Difference]: With dead ends: 7197 [2022-02-16 14:07:22,533 INFO L226 Difference]: Without dead ends: 7187 [2022-02-16 14:07:22,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:07:22,534 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:22,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 68 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 257 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-02-16 14:07:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2022-02-16 14:07:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 7100. [2022-02-16 14:07:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7100 states, 7099 states have (on average 2.682490491618538) internal successors, (19043), 7099 states have internal predecessors, (19043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7100 states to 7100 states and 19043 transitions. [2022-02-16 14:07:22,629 INFO L78 Accepts]: Start accepts. Automaton has 7100 states and 19043 transitions. Word has length 25 [2022-02-16 14:07:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:22,629 INFO L470 AbstractCegarLoop]: Abstraction has 7100 states and 19043 transitions. [2022-02-16 14:07:22,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 7100 states and 19043 transitions. [2022-02-16 14:07:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:22,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:22,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:22,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:22,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-02-16 14:07:22,844 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -459174110, now seen corresponding path program 36 times [2022-02-16 14:07:22,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:22,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627348496] [2022-02-16 14:07:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:22,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:22,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:22,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627348496] [2022-02-16 14:07:22,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627348496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:22,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874013422] [2022-02-16 14:07:22,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:22,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:22,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:22,992 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) [2022-02-16 14:07:22,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-16 14:07:23,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:07:23,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:23,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:07:23,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:23,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:23,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874013422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:23,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:23,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 14:07:23,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214267582] [2022-02-16 14:07:23,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:23,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:07:23,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:23,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:07:23,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:07:23,749 INFO L87 Difference]: Start difference. First operand 7100 states and 19043 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-16 14:07:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:25,899 INFO L93 Difference]: Finished difference Result 8764 states and 23190 transitions. [2022-02-16 14:07:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 14:07:25,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 25 [2022-02-16 14:07:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:25,915 INFO L225 Difference]: With dead ends: 8764 [2022-02-16 14:07:25,915 INFO L226 Difference]: Without dead ends: 8744 [2022-02-16 14:07:25,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=953, Invalid=2829, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 14:07:25,916 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 405 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:25,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 121 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 491 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-02-16 14:07:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2022-02-16 14:07:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7199. [2022-02-16 14:07:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7198 states have (on average 2.686023895526535) internal successors, (19334), 7198 states have internal predecessors, (19334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 19334 transitions. [2022-02-16 14:07:26,030 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 19334 transitions. Word has length 25 [2022-02-16 14:07:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:26,030 INFO L470 AbstractCegarLoop]: Abstraction has 7199 states and 19334 transitions. [2022-02-16 14:07:26,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-16 14:07:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 19334 transitions. [2022-02-16 14:07:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:26,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:26,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:26,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:26,255 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,SelfDestructingSolverStorable61 [2022-02-16 14:07:26,255 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash -444317614, now seen corresponding path program 37 times [2022-02-16 14:07:26,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:26,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116108776] [2022-02-16 14:07:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:26,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:26,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:26,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116108776] [2022-02-16 14:07:26,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116108776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:26,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400704521] [2022-02-16 14:07:26,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:26,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:26,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:26,332 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) [2022-02-16 14:07:26,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-16 14:07:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:26,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:26,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400704521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:26,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:26,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 14:07:26,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899055480] [2022-02-16 14:07:26,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:26,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:07:26,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:07:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:07:26,764 INFO L87 Difference]: Start difference. First operand 7199 states and 19334 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-16 14:07:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:28,299 INFO L93 Difference]: Finished difference Result 8935 states and 22828 transitions. [2022-02-16 14:07:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-16 14:07:28,299 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 25 [2022-02-16 14:07:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:28,314 INFO L225 Difference]: With dead ends: 8935 [2022-02-16 14:07:28,314 INFO L226 Difference]: Without dead ends: 8908 [2022-02-16 14:07:28,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=682, Invalid=4148, Unknown=0, NotChecked=0, Total=4830 [2022-02-16 14:07:28,315 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 249 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:28,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 328 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:07:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8908 states. [2022-02-16 14:07:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8908 to 7490. [2022-02-16 14:07:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.687274669515289) internal successors, (20125), 7489 states have internal predecessors, (20125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 20125 transitions. [2022-02-16 14:07:28,507 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 20125 transitions. Word has length 25 [2022-02-16 14:07:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:28,507 INFO L470 AbstractCegarLoop]: Abstraction has 7490 states and 20125 transitions. [2022-02-16 14:07:28,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-16 14:07:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 20125 transitions. [2022-02-16 14:07:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:28,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:28,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:28,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:28,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:28,730 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1991517278, now seen corresponding path program 38 times [2022-02-16 14:07:28,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:28,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566947001] [2022-02-16 14:07:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:28,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:28,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:28,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566947001] [2022-02-16 14:07:28,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566947001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:28,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443059081] [2022-02-16 14:07:28,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:28,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:28,839 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) [2022-02-16 14:07:28,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:28,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:28,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 14:07:28,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:28,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-16 14:07:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:29,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:29,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443059081] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:29,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:29,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 14:07:29,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13699202] [2022-02-16 14:07:29,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:29,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:07:29,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:07:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:07:29,471 INFO L87 Difference]: Start difference. First operand 7490 states and 20125 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:33,640 INFO L93 Difference]: Finished difference Result 13315 states and 35288 transitions. [2022-02-16 14:07:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-16 14:07:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:33,664 INFO L225 Difference]: With dead ends: 13315 [2022-02-16 14:07:33,665 INFO L226 Difference]: Without dead ends: 13250 [2022-02-16 14:07:33,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1661, Invalid=6529, Unknown=0, NotChecked=0, Total=8190 [2022-02-16 14:07:33,666 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 439 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:33,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 386 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:07:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13250 states. [2022-02-16 14:07:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13250 to 8143. [2022-02-16 14:07:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8143 states, 8142 states have (on average 2.7135838860230903) internal successors, (22094), 8142 states have internal predecessors, (22094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8143 states to 8143 states and 22094 transitions. [2022-02-16 14:07:33,832 INFO L78 Accepts]: Start accepts. Automaton has 8143 states and 22094 transitions. Word has length 25 [2022-02-16 14:07:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:33,832 INFO L470 AbstractCegarLoop]: Abstraction has 8143 states and 22094 transitions. [2022-02-16 14:07:33,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 8143 states and 22094 transitions. [2022-02-16 14:07:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:33,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:33,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:33,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:34,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:34,059 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash -369306406, now seen corresponding path program 39 times [2022-02-16 14:07:34,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:34,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166465972] [2022-02-16 14:07:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:34,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:34,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:34,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166465972] [2022-02-16 14:07:34,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166465972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:34,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129047516] [2022-02-16 14:07:34,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:07:34,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:34,148 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) [2022-02-16 14:07:34,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-16 14:07:34,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:07:34,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 14:07:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:34,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:34,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129047516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:34,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:34,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-02-16 14:07:34,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998370624] [2022-02-16 14:07:34,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:34,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:34,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:34,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:34,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:34,572 INFO L87 Difference]: Start difference. First operand 8143 states and 22094 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-02-16 14:07:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:35,262 INFO L93 Difference]: Finished difference Result 9015 states and 23795 transitions. [2022-02-16 14:07:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:07:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 25 [2022-02-16 14:07:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:35,279 INFO L225 Difference]: With dead ends: 9015 [2022-02-16 14:07:35,279 INFO L226 Difference]: Without dead ends: 9003 [2022-02-16 14:07:35,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:07:35,279 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 131 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:35,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 147 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9003 states. [2022-02-16 14:07:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9003 to 8188. [2022-02-16 14:07:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 8187 states have (on average 2.7106388176377183) internal successors, (22192), 8187 states have internal predecessors, (22192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 22192 transitions. [2022-02-16 14:07:35,419 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 22192 transitions. Word has length 25 [2022-02-16 14:07:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:35,420 INFO L470 AbstractCegarLoop]: Abstraction has 8188 states and 22192 transitions. [2022-02-16 14:07:35,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-02-16 14:07:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 22192 transitions. [2022-02-16 14:07:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:35,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:35,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:35,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:35,642 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,SelfDestructingSolverStorable64 [2022-02-16 14:07:35,643 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash -808005474, now seen corresponding path program 40 times [2022-02-16 14:07:35,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:35,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941087896] [2022-02-16 14:07:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:35,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:35,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:35,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941087896] [2022-02-16 14:07:35,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941087896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:35,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676737161] [2022-02-16 14:07:35,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:07:35,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:35,780 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) [2022-02-16 14:07:35,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-16 14:07:35,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:07:35,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-16 14:07:35,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:35,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:36,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676737161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:36,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:36,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 14:07:36,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233736930] [2022-02-16 14:07:36,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:36,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:36,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:36,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:36,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:36,240 INFO L87 Difference]: Start difference. First operand 8188 states and 22192 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:37,101 INFO L93 Difference]: Finished difference Result 8616 states and 22910 transitions. [2022-02-16 14:07:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:07:37,102 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:37,118 INFO L225 Difference]: With dead ends: 8616 [2022-02-16 14:07:37,118 INFO L226 Difference]: Without dead ends: 8594 [2022-02-16 14:07:37,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:07:37,118 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 138 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:37,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 156 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:07:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8594 states. [2022-02-16 14:07:37,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8594 to 8267. [2022-02-16 14:07:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8267 states, 8266 states have (on average 2.703968061940479) internal successors, (22351), 8266 states have internal predecessors, (22351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8267 states to 8267 states and 22351 transitions. [2022-02-16 14:07:37,256 INFO L78 Accepts]: Start accepts. Automaton has 8267 states and 22351 transitions. Word has length 25 [2022-02-16 14:07:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:37,256 INFO L470 AbstractCegarLoop]: Abstraction has 8267 states and 22351 transitions. [2022-02-16 14:07:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8267 states and 22351 transitions. [2022-02-16 14:07:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:37,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:37,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:37,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:37,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-16 14:07:37,472 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1075762138, now seen corresponding path program 41 times [2022-02-16 14:07:37,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:37,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780876411] [2022-02-16 14:07:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:37,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:37,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:37,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780876411] [2022-02-16 14:07:37,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780876411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:37,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313231855] [2022-02-16 14:07:37,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:07:37,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:37,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:37,607 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) [2022-02-16 14:07:37,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-16 14:07:37,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:07:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:07:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:37,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:38,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313231855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:38,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:38,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-02-16 14:07:38,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162904135] [2022-02-16 14:07:38,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:38,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:07:38,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:07:38,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:07:38,154 INFO L87 Difference]: Start difference. First operand 8267 states and 22351 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:40,819 INFO L93 Difference]: Finished difference Result 13790 states and 35381 transitions. [2022-02-16 14:07:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-16 14:07:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:40,845 INFO L225 Difference]: With dead ends: 13790 [2022-02-16 14:07:40,845 INFO L226 Difference]: Without dead ends: 13746 [2022-02-16 14:07:40,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1723, Invalid=6649, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:07:40,855 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 500 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:40,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 239 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:07:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13746 states. [2022-02-16 14:07:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13746 to 9285. [2022-02-16 14:07:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9285 states, 9284 states have (on average 2.7457992244722105) internal successors, (25492), 9284 states have internal predecessors, (25492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9285 states to 9285 states and 25492 transitions. [2022-02-16 14:07:41,046 INFO L78 Accepts]: Start accepts. Automaton has 9285 states and 25492 transitions. Word has length 25 [2022-02-16 14:07:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:41,046 INFO L470 AbstractCegarLoop]: Abstraction has 9285 states and 25492 transitions. [2022-02-16 14:07:41,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9285 states and 25492 transitions. [2022-02-16 14:07:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:41,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:41,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:41,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:41,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:41,274 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash 189408338, now seen corresponding path program 42 times [2022-02-16 14:07:41,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:41,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779789112] [2022-02-16 14:07:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:41,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:41,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:41,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779789112] [2022-02-16 14:07:41,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779789112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:41,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292487978] [2022-02-16 14:07:41,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:41,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:41,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:41,356 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) [2022-02-16 14:07:41,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-16 14:07:41,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:07:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-16 14:07:41,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:41,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:41,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292487978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:41,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:41,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-02-16 14:07:41,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135164879] [2022-02-16 14:07:41,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:41,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-16 14:07:41,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-16 14:07:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:07:41,602 INFO L87 Difference]: Start difference. First operand 9285 states and 25492 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:41,754 INFO L93 Difference]: Finished difference Result 9389 states and 25629 transitions. [2022-02-16 14:07:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 14:07:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:41,771 INFO L225 Difference]: With dead ends: 9389 [2022-02-16 14:07:41,772 INFO L226 Difference]: Without dead ends: 9384 [2022-02-16 14:07:41,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:07:41,772 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:41,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 123 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2022-02-16 14:07:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 9285. [2022-02-16 14:07:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9285 states, 9284 states have (on average 2.7457992244722105) internal successors, (25492), 9284 states have internal predecessors, (25492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9285 states to 9285 states and 25492 transitions. [2022-02-16 14:07:41,914 INFO L78 Accepts]: Start accepts. Automaton has 9285 states and 25492 transitions. Word has length 25 [2022-02-16 14:07:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:41,914 INFO L470 AbstractCegarLoop]: Abstraction has 9285 states and 25492 transitions. [2022-02-16 14:07:41,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 9285 states and 25492 transitions. [2022-02-16 14:07:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:41,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:41,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:41,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:42,135 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,SelfDestructingSolverStorable67 [2022-02-16 14:07:42,135 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2122101590, now seen corresponding path program 13 times [2022-02-16 14:07:42,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:42,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479648715] [2022-02-16 14:07:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:42,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:42,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:42,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479648715] [2022-02-16 14:07:42,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479648715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:42,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504018274] [2022-02-16 14:07:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:42,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:42,192 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) [2022-02-16 14:07:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:07:42,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:42,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-16 14:07:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:42,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:42,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504018274] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:42,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:42,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 15 [2022-02-16 14:07:42,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342023544] [2022-02-16 14:07:42,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:42,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 14:07:42,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 14:07:42,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:07:42,392 INFO L87 Difference]: Start difference. First operand 9285 states and 25492 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2022-02-16 14:07:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:42,757 INFO L93 Difference]: Finished difference Result 16193 states and 43678 transitions. [2022-02-16 14:07:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:07:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 25 [2022-02-16 14:07:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:42,789 INFO L225 Difference]: With dead ends: 16193 [2022-02-16 14:07:42,790 INFO L226 Difference]: Without dead ends: 16193 [2022-02-16 14:07:42,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:07:42,790 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 214 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:42,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 87 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16193 states. [2022-02-16 14:07:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16193 to 10998. [2022-02-16 14:07:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10998 states, 10997 states have (on average 2.7349277075566065) internal successors, (30076), 10997 states have internal predecessors, (30076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10998 states to 10998 states and 30076 transitions. [2022-02-16 14:07:42,991 INFO L78 Accepts]: Start accepts. Automaton has 10998 states and 30076 transitions. Word has length 25 [2022-02-16 14:07:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:42,991 INFO L470 AbstractCegarLoop]: Abstraction has 10998 states and 30076 transitions. [2022-02-16 14:07:42,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2022-02-16 14:07:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10998 states and 30076 transitions. [2022-02-16 14:07:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:43,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:43,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:43,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:43,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-16 14:07:43,224 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1298444710, now seen corresponding path program 14 times [2022-02-16 14:07:43,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:43,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645065694] [2022-02-16 14:07:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:43,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:43,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:43,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645065694] [2022-02-16 14:07:43,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645065694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:43,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643918521] [2022-02-16 14:07:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:43,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:43,249 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) [2022-02-16 14:07:43,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-16 14:07:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:07:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:43,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643918521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:43,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:43,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 17 [2022-02-16 14:07:43,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522694130] [2022-02-16 14:07:43,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:43,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:07:43,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:07:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:07:43,476 INFO L87 Difference]: Start difference. First operand 10998 states and 30076 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2022-02-16 14:07:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:43,766 INFO L93 Difference]: Finished difference Result 11698 states and 31375 transitions. [2022-02-16 14:07:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:07:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 25 [2022-02-16 14:07:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:43,792 INFO L225 Difference]: With dead ends: 11698 [2022-02-16 14:07:43,792 INFO L226 Difference]: Without dead ends: 11674 [2022-02-16 14:07:43,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:07:43,793 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:43,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 79 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2022-02-16 14:07:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 10970. [2022-02-16 14:07:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10970 states, 10969 states have (on average 2.7372595496398944) internal successors, (30025), 10969 states have internal predecessors, (30025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 30025 transitions. [2022-02-16 14:07:43,961 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 30025 transitions. Word has length 25 [2022-02-16 14:07:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:43,961 INFO L470 AbstractCegarLoop]: Abstraction has 10970 states and 30025 transitions. [2022-02-16 14:07:43,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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) [2022-02-16 14:07:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 30025 transitions. [2022-02-16 14:07:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:07:43,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:43,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:43,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:44,190 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,SelfDestructingSolverStorable69 [2022-02-16 14:07:44,190 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash -725103858, now seen corresponding path program 15 times [2022-02-16 14:07:44,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:44,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322170654] [2022-02-16 14:07:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:44,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:44,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:44,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322170654] [2022-02-16 14:07:44,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322170654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:44,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476899278] [2022-02-16 14:07:44,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:07:44,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:44,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:44,226 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) [2022-02-16 14:07:44,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-16 14:07:44,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:07:44,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:44,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:07:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:44,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:44,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476899278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:44,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:44,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 17 [2022-02-16 14:07:44,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998261506] [2022-02-16 14:07:44,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:44,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:07:44,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:44,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:07:44,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:07:44,370 INFO L87 Difference]: Start difference. First operand 10970 states and 30025 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:44,612 INFO L93 Difference]: Finished difference Result 12502 states and 33172 transitions. [2022-02-16 14:07:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:07:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:07:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:44,635 INFO L225 Difference]: With dead ends: 12502 [2022-02-16 14:07:44,635 INFO L226 Difference]: Without dead ends: 12464 [2022-02-16 14:07:44,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:07:44,636 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:44,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 78 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12464 states. [2022-02-16 14:07:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12464 to 11698. [2022-02-16 14:07:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11698 states, 11697 states have (on average 2.7103530819868342) internal successors, (31703), 11697 states have internal predecessors, (31703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11698 states to 11698 states and 31703 transitions. [2022-02-16 14:07:44,821 INFO L78 Accepts]: Start accepts. Automaton has 11698 states and 31703 transitions. Word has length 25 [2022-02-16 14:07:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:44,821 INFO L470 AbstractCegarLoop]: Abstraction has 11698 states and 31703 transitions. [2022-02-16 14:07:44,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 11698 states and 31703 transitions. [2022-02-16 14:07:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:44,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:44,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:44,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:45,053 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,SelfDestructingSolverStorable70 [2022-02-16 14:07:45,053 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash -271337748, now seen corresponding path program 11 times [2022-02-16 14:07:45,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:45,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153382755] [2022-02-16 14:07:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:45,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:45,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:45,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153382755] [2022-02-16 14:07:45,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153382755] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:45,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259518985] [2022-02-16 14:07:45,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:07:45,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:45,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:45,131 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) [2022-02-16 14:07:45,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-16 14:07:45,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:07:45,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:45,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:07:45,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:45,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:45,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259518985] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:45,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:45,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2022-02-16 14:07:45,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077424405] [2022-02-16 14:07:45,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:45,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:07:45,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:45,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:07:45,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:07:45,311 INFO L87 Difference]: Start difference. First operand 11698 states and 31703 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:45,582 INFO L93 Difference]: Finished difference Result 11782 states and 31837 transitions. [2022-02-16 14:07:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 14:07:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:07:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:45,600 INFO L225 Difference]: With dead ends: 11782 [2022-02-16 14:07:45,600 INFO L226 Difference]: Without dead ends: 11777 [2022-02-16 14:07:45,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:07:45,601 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:45,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 192 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11777 states. [2022-02-16 14:07:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11777 to 11706. [2022-02-16 14:07:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11706 states, 11705 states have (on average 2.7095258436565572) internal successors, (31715), 11705 states have internal predecessors, (31715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11706 states to 11706 states and 31715 transitions. [2022-02-16 14:07:45,763 INFO L78 Accepts]: Start accepts. Automaton has 11706 states and 31715 transitions. Word has length 27 [2022-02-16 14:07:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:45,763 INFO L470 AbstractCegarLoop]: Abstraction has 11706 states and 31715 transitions. [2022-02-16 14:07:45,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 11706 states and 31715 transitions. [2022-02-16 14:07:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:45,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:45,779 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:45,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:45,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:45,995 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1958031440, now seen corresponding path program 12 times [2022-02-16 14:07:45,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:45,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990958801] [2022-02-16 14:07:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:45,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:46,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:46,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990958801] [2022-02-16 14:07:46,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990958801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:46,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880016130] [2022-02-16 14:07:46,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:46,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:46,074 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) [2022-02-16 14:07:46,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-16 14:07:46,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:07:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:46,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:07:46,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:46,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:46,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880016130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:46,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:46,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2022-02-16 14:07:46,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098151154] [2022-02-16 14:07:46,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:46,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:07:46,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:07:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:07:46,304 INFO L87 Difference]: Start difference. First operand 11706 states and 31715 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:46,520 INFO L93 Difference]: Finished difference Result 11931 states and 32090 transitions. [2022-02-16 14:07:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:07:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:07:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:46,549 INFO L225 Difference]: With dead ends: 11931 [2022-02-16 14:07:46,549 INFO L226 Difference]: Without dead ends: 11924 [2022-02-16 14:07:46,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:07:46,549 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:46,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 259 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11924 states. [2022-02-16 14:07:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11924 to 11715. [2022-02-16 14:07:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11715 states, 11714 states have (on average 2.709407546525525) internal successors, (31738), 11714 states have internal predecessors, (31738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11715 states to 11715 states and 31738 transitions. [2022-02-16 14:07:46,744 INFO L78 Accepts]: Start accepts. Automaton has 11715 states and 31738 transitions. Word has length 27 [2022-02-16 14:07:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:46,744 INFO L470 AbstractCegarLoop]: Abstraction has 11715 states and 31738 transitions. [2022-02-16 14:07:46,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 11715 states and 31738 transitions. [2022-02-16 14:07:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:46,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:46,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:46,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-16 14:07:46,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:46,976 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1883020232, now seen corresponding path program 13 times [2022-02-16 14:07:46,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:46,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458778369] [2022-02-16 14:07:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:46,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:47,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:47,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458778369] [2022-02-16 14:07:47,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458778369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:47,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380581609] [2022-02-16 14:07:47,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:47,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:47,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:47,080 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) [2022-02-16 14:07:47,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-16 14:07:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:07:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:47,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:47,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380581609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:47,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:47,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 16 [2022-02-16 14:07:47,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509366301] [2022-02-16 14:07:47,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:47,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:07:47,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:07:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:07:47,399 INFO L87 Difference]: Start difference. First operand 11715 states and 31738 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2022-02-16 14:07:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:47,663 INFO L93 Difference]: Finished difference Result 12086 states and 32383 transitions. [2022-02-16 14:07:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:07:47,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 [2022-02-16 14:07:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:47,688 INFO L225 Difference]: With dead ends: 12086 [2022-02-16 14:07:47,688 INFO L226 Difference]: Without dead ends: 12074 [2022-02-16 14:07:47,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:07:47,688 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 74 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:47,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 230 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12074 states. [2022-02-16 14:07:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12074 to 11762. [2022-02-16 14:07:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11762 states, 11761 states have (on average 2.7062324632259163) internal successors, (31828), 11761 states have internal predecessors, (31828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11762 states to 11762 states and 31828 transitions. [2022-02-16 14:07:47,862 INFO L78 Accepts]: Start accepts. Automaton has 11762 states and 31828 transitions. Word has length 27 [2022-02-16 14:07:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:47,862 INFO L470 AbstractCegarLoop]: Abstraction has 11762 states and 31828 transitions. [2022-02-16 14:07:47,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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) [2022-02-16 14:07:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 11762 states and 31828 transitions. [2022-02-16 14:07:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:47,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:47,877 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:47,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:48,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:48,093 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:48,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1973247996, now seen corresponding path program 14 times [2022-02-16 14:07:48,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:48,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712904318] [2022-02-16 14:07:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:48,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:48,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:48,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712904318] [2022-02-16 14:07:48,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712904318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:48,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465139879] [2022-02-16 14:07:48,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:48,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:48,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:48,200 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) [2022-02-16 14:07:48,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-16 14:07:48,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:48,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:07:48,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:07:48,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:07:48,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465139879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:48,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:48,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 17 [2022-02-16 14:07:48,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543709196] [2022-02-16 14:07:48,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:48,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:07:48,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:07:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:07:48,534 INFO L87 Difference]: Start difference. First operand 11762 states and 31828 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:48,823 INFO L93 Difference]: Finished difference Result 12017 states and 32268 transitions. [2022-02-16 14:07:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:07:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:07:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:48,847 INFO L225 Difference]: With dead ends: 12017 [2022-02-16 14:07:48,847 INFO L226 Difference]: Without dead ends: 12012 [2022-02-16 14:07:48,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:48,847 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 75 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:48,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 262 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12012 states. [2022-02-16 14:07:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12012 to 11793. [2022-02-16 14:07:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11793 states, 11792 states have (on average 2.7049694708276797) internal successors, (31897), 11792 states have internal predecessors, (31897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11793 states to 11793 states and 31897 transitions. [2022-02-16 14:07:49,039 INFO L78 Accepts]: Start accepts. Automaton has 11793 states and 31897 transitions. Word has length 27 [2022-02-16 14:07:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:49,039 INFO L470 AbstractCegarLoop]: Abstraction has 11793 states and 31897 transitions. [2022-02-16 14:07:49,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 11793 states and 31897 transitions. [2022-02-16 14:07:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:49,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:49,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:49,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:49,271 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,SelfDestructingSolverStorable74 [2022-02-16 14:07:49,271 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 631406832, now seen corresponding path program 43 times [2022-02-16 14:07:49,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:49,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88964172] [2022-02-16 14:07:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:49,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:07:49,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:49,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88964172] [2022-02-16 14:07:49,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88964172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:49,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105202732] [2022-02-16 14:07:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:49,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:49,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:49,308 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) [2022-02-16 14:07:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:07:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:49,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-16 14:07:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:07:49,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:07:49,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105202732] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:49,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:49,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2022-02-16 14:07:49,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568474090] [2022-02-16 14:07:49,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:49,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:07:49,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:07:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:07:49,505 INFO L87 Difference]: Start difference. First operand 11793 states and 31897 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:49,686 INFO L93 Difference]: Finished difference Result 12115 states and 32440 transitions. [2022-02-16 14:07:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:07:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:07:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:49,710 INFO L225 Difference]: With dead ends: 12115 [2022-02-16 14:07:49,710 INFO L226 Difference]: Without dead ends: 12103 [2022-02-16 14:07:49,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:07:49,710 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:49,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 66 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12103 states. [2022-02-16 14:07:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12103 to 11817. [2022-02-16 14:07:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11817 states, 11816 states have (on average 2.7032836831415032) internal successors, (31942), 11816 states have internal predecessors, (31942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11817 states to 11817 states and 31942 transitions. [2022-02-16 14:07:49,914 INFO L78 Accepts]: Start accepts. Automaton has 11817 states and 31942 transitions. Word has length 27 [2022-02-16 14:07:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:49,914 INFO L470 AbstractCegarLoop]: Abstraction has 11817 states and 31942 transitions. [2022-02-16 14:07:49,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11817 states and 31942 transitions. [2022-02-16 14:07:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:49,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:49,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:49,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-16 14:07:50,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:50,144 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash 611513468, now seen corresponding path program 44 times [2022-02-16 14:07:50,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:50,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49605198] [2022-02-16 14:07:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:50,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:50,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:50,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49605198] [2022-02-16 14:07:50,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49605198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:50,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569273706] [2022-02-16 14:07:50,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:07:50,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:50,185 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) [2022-02-16 14:07:50,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-16 14:07:50,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:07:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:07:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:50,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:50,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569273706] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:50,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:50,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-02-16 14:07:50,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598700372] [2022-02-16 14:07:50,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:50,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:07:50,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:07:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:07:50,428 INFO L87 Difference]: Start difference. First operand 11817 states and 31942 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:50,842 INFO L93 Difference]: Finished difference Result 14776 states and 38471 transitions. [2022-02-16 14:07:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:07:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:07:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:50,874 INFO L225 Difference]: With dead ends: 14776 [2022-02-16 14:07:50,874 INFO L226 Difference]: Without dead ends: 14758 [2022-02-16 14:07:50,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=1187, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 14:07:50,875 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 212 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:50,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 98 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14758 states. [2022-02-16 14:07:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14758 to 13628. [2022-02-16 14:07:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13628 states, 13627 states have (on average 2.6770382329199385) internal successors, (36480), 13627 states have internal predecessors, (36480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13628 states to 13628 states and 36480 transitions. [2022-02-16 14:07:51,219 INFO L78 Accepts]: Start accepts. Automaton has 13628 states and 36480 transitions. Word has length 27 [2022-02-16 14:07:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:51,219 INFO L470 AbstractCegarLoop]: Abstraction has 13628 states and 36480 transitions. [2022-02-16 14:07:51,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 13628 states and 36480 transitions. [2022-02-16 14:07:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:51,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:51,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:51,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-16 14:07:51,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:51,455 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1626646840, now seen corresponding path program 45 times [2022-02-16 14:07:51,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:51,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872158576] [2022-02-16 14:07:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:51,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:51,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:51,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872158576] [2022-02-16 14:07:51,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872158576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:51,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148560349] [2022-02-16 14:07:51,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:07:51,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:51,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:51,520 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) [2022-02-16 14:07:51,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-16 14:07:51,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:07:51,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:51,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:07:51,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:51,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148560349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:51,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:51,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-02-16 14:07:51,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739002282] [2022-02-16 14:07:51,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:51,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:07:51,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:51,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:07:51,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:07:51,670 INFO L87 Difference]: Start difference. First operand 13628 states and 36480 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-02-16 14:07:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:52,143 INFO L93 Difference]: Finished difference Result 36885 states and 99083 transitions. [2022-02-16 14:07:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:07:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 27 [2022-02-16 14:07:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:52,237 INFO L225 Difference]: With dead ends: 36885 [2022-02-16 14:07:52,237 INFO L226 Difference]: Without dead ends: 36868 [2022-02-16 14:07:52,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=683, Invalid=1209, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:07:52,238 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:52,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 80 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36868 states. [2022-02-16 14:07:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36868 to 19913. [2022-02-16 14:07:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19913 states, 19912 states have (on average 2.676978706307754) internal successors, (53304), 19912 states have internal predecessors, (53304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19913 states to 19913 states and 53304 transitions. [2022-02-16 14:07:52,849 INFO L78 Accepts]: Start accepts. Automaton has 19913 states and 53304 transitions. Word has length 27 [2022-02-16 14:07:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:52,849 INFO L470 AbstractCegarLoop]: Abstraction has 19913 states and 53304 transitions. [2022-02-16 14:07:52,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-02-16 14:07:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19913 states and 53304 transitions. [2022-02-16 14:07:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:52,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:52,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:52,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:53,091 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,SelfDestructingSolverStorable77 [2022-02-16 14:07:53,091 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -706189384, now seen corresponding path program 46 times [2022-02-16 14:07:53,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:53,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327850080] [2022-02-16 14:07:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:53,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:53,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:53,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327850080] [2022-02-16 14:07:53,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327850080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:53,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655620455] [2022-02-16 14:07:53,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:07:53,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:53,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:53,125 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) [2022-02-16 14:07:53,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-16 14:07:53,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:07:53,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:07:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:53,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:53,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655620455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:53,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:53,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 22 [2022-02-16 14:07:53,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019689923] [2022-02-16 14:07:53,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:53,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:07:53,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:07:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:07:53,424 INFO L87 Difference]: Start difference. First operand 19913 states and 53304 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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) [2022-02-16 14:07:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:53,954 INFO L93 Difference]: Finished difference Result 21344 states and 55969 transitions. [2022-02-16 14:07:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:07:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 27 [2022-02-16 14:07:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:54,004 INFO L225 Difference]: With dead ends: 21344 [2022-02-16 14:07:54,004 INFO L226 Difference]: Without dead ends: 21306 [2022-02-16 14:07:54,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=727, Invalid=1435, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 14:07:54,005 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 168 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:54,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 100 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21306 states. [2022-02-16 14:07:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21306 to 19850. [2022-02-16 14:07:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19850 states, 19849 states have (on average 2.6796312156783717) internal successors, (53188), 19849 states have internal predecessors, (53188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19850 states to 19850 states and 53188 transitions. [2022-02-16 14:07:54,425 INFO L78 Accepts]: Start accepts. Automaton has 19850 states and 53188 transitions. Word has length 27 [2022-02-16 14:07:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:54,425 INFO L470 AbstractCegarLoop]: Abstraction has 19850 states and 53188 transitions. [2022-02-16 14:07:54,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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) [2022-02-16 14:07:54,425 INFO L276 IsEmpty]: Start isEmpty. Operand 19850 states and 53188 transitions. [2022-02-16 14:07:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:54,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:54,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:54,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:54,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-16 14:07:54,671 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2111534302, now seen corresponding path program 47 times [2022-02-16 14:07:54,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:54,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210809987] [2022-02-16 14:07:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:54,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:54,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:54,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210809987] [2022-02-16 14:07:54,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210809987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:54,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651727666] [2022-02-16 14:07:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:07:54,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:54,709 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) [2022-02-16 14:07:54,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-16 14:07:54,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:07:54,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:07:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:54,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:54,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651727666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:54,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:54,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-02-16 14:07:54,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254337460] [2022-02-16 14:07:54,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:54,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:07:54,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:07:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:07:54,864 INFO L87 Difference]: Start difference. First operand 19850 states and 53188 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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) [2022-02-16 14:07:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:55,384 INFO L93 Difference]: Finished difference Result 34707 states and 92518 transitions. [2022-02-16 14:07:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-16 14:07:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 [2022-02-16 14:07:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:55,481 INFO L225 Difference]: With dead ends: 34707 [2022-02-16 14:07:55,482 INFO L226 Difference]: Without dead ends: 34658 [2022-02-16 14:07:55,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=790, Invalid=1862, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 14:07:55,482 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 240 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:55,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 94 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34658 states. [2022-02-16 14:07:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34658 to 23945. [2022-02-16 14:07:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23945 states, 23944 states have (on average 2.685641496825927) internal successors, (64305), 23944 states have internal predecessors, (64305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23945 states to 23945 states and 64305 transitions. [2022-02-16 14:07:56,130 INFO L78 Accepts]: Start accepts. Automaton has 23945 states and 64305 transitions. Word has length 27 [2022-02-16 14:07:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:56,130 INFO L470 AbstractCegarLoop]: Abstraction has 23945 states and 64305 transitions. [2022-02-16 14:07:56,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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) [2022-02-16 14:07:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 23945 states and 64305 transitions. [2022-02-16 14:07:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:56,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:56,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:56,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-16 14:07:56,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:56,384 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash -559638494, now seen corresponding path program 48 times [2022-02-16 14:07:56,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:56,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862846958] [2022-02-16 14:07:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:56,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:56,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:56,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862846958] [2022-02-16 14:07:56,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862846958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:56,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078990693] [2022-02-16 14:07:56,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:07:56,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:56,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:56,438 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) [2022-02-16 14:07:56,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-16 14:07:56,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:07:56,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:07:56,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:07:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:56,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:56,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078990693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:56,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:56,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 17 [2022-02-16 14:07:56,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442928759] [2022-02-16 14:07:56,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:56,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:07:56,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:07:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:07:56,625 INFO L87 Difference]: Start difference. First operand 23945 states and 64305 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:57,157 INFO L93 Difference]: Finished difference Result 59743 states and 164343 transitions. [2022-02-16 14:07:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 14:07:57,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:07:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:57,351 INFO L225 Difference]: With dead ends: 59743 [2022-02-16 14:07:57,351 INFO L226 Difference]: Without dead ends: 59743 [2022-02-16 14:07:57,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=463, Invalid=1019, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:07:57,352 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 232 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:57,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 88 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:07:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59743 states. [2022-02-16 14:07:58,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59743 to 34883. [2022-02-16 14:07:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34883 states, 34882 states have (on average 2.770311335359211) internal successors, (96634), 34882 states have internal predecessors, (96634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34883 states to 34883 states and 96634 transitions. [2022-02-16 14:07:58,306 INFO L78 Accepts]: Start accepts. Automaton has 34883 states and 96634 transitions. Word has length 27 [2022-02-16 14:07:58,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:07:58,306 INFO L470 AbstractCegarLoop]: Abstraction has 34883 states and 96634 transitions. [2022-02-16 14:07:58,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:58,306 INFO L276 IsEmpty]: Start isEmpty. Operand 34883 states and 96634 transitions. [2022-02-16 14:07:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:07:58,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:07:58,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:07:58,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-16 14:07:58,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:58,575 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:07:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:07:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash 518555500, now seen corresponding path program 49 times [2022-02-16 14:07:58,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:07:58,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003649182] [2022-02-16 14:07:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:07:58,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:07:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:58,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:07:58,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003649182] [2022-02-16 14:07:58,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003649182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:07:58,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141373659] [2022-02-16 14:07:58,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:07:58,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:07:58,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:07:58,623 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) [2022-02-16 14:07:58,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-16 14:07:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:07:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:07:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:07:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:58,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:07:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:07:58,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141373659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:07:58,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:07:58,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2022-02-16 14:07:58,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918971712] [2022-02-16 14:07:58,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:07:58,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:07:58,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:07:58,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:07:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:07:58,843 INFO L87 Difference]: Start difference. First operand 34883 states and 96634 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:07:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:07:59,304 INFO L93 Difference]: Finished difference Result 38113 states and 103337 transitions. [2022-02-16 14:07:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:07:59,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:07:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:07:59,412 INFO L225 Difference]: With dead ends: 38113 [2022-02-16 14:07:59,413 INFO L226 Difference]: Without dead ends: 38102 [2022-02-16 14:07:59,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:07:59,413 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:07:59,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 77 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:07:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38102 states. [2022-02-16 14:08:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38102 to 35459. [2022-02-16 14:08:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35459 states, 35458 states have (on average 2.765327993682667) internal successors, (98053), 35458 states have internal predecessors, (98053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35459 states to 35459 states and 98053 transitions. [2022-02-16 14:08:00,762 INFO L78 Accepts]: Start accepts. Automaton has 35459 states and 98053 transitions. Word has length 27 [2022-02-16 14:08:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:00,762 INFO L470 AbstractCegarLoop]: Abstraction has 35459 states and 98053 transitions. [2022-02-16 14:08:00,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35459 states and 98053 transitions. [2022-02-16 14:08:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:00,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:00,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:00,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:01,035 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,SelfDestructingSolverStorable81 [2022-02-16 14:08:01,035 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1118441136, now seen corresponding path program 15 times [2022-02-16 14:08:01,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:01,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243823214] [2022-02-16 14:08:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:01,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:01,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:01,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243823214] [2022-02-16 14:08:01,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243823214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:01,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950789059] [2022-02-16 14:08:01,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:08:01,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:01,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:01,098 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) [2022-02-16 14:08:01,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-16 14:08:01,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:08:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:08:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:01,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:01,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950789059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:01,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:01,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-02-16 14:08:01,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124842318] [2022-02-16 14:08:01,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:01,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 14:08:01,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 14:08:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-16 14:08:01,296 INFO L87 Difference]: Start difference. First operand 35459 states and 98053 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:01,760 INFO L93 Difference]: Finished difference Result 35714 states and 98472 transitions. [2022-02-16 14:08:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:08:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:01,863 INFO L225 Difference]: With dead ends: 35714 [2022-02-16 14:08:01,863 INFO L226 Difference]: Without dead ends: 35709 [2022-02-16 14:08:01,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-02-16 14:08:01,864 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 46 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 206 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:08:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35709 states. [2022-02-16 14:08:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35709 to 35462. [2022-02-16 14:08:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35462 states, 35461 states have (on average 2.7653760469247906) internal successors, (98063), 35461 states have internal predecessors, (98063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35462 states to 35462 states and 98063 transitions. [2022-02-16 14:08:02,759 INFO L78 Accepts]: Start accepts. Automaton has 35462 states and 98063 transitions. Word has length 27 [2022-02-16 14:08:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:02,759 INFO L470 AbstractCegarLoop]: Abstraction has 35462 states and 98063 transitions. [2022-02-16 14:08:02,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 35462 states and 98063 transitions. [2022-02-16 14:08:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:02,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:02,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:02,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:03,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:03,020 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash 364463420, now seen corresponding path program 50 times [2022-02-16 14:08:03,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:03,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509221305] [2022-02-16 14:08:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:03,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:03,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:03,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509221305] [2022-02-16 14:08:03,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509221305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:03,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107563798] [2022-02-16 14:08:03,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:08:03,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:03,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:03,083 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) [2022-02-16 14:08:03,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-16 14:08:03,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:08:03,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:03,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:03,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107563798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:03,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:03,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-02-16 14:08:03,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061681184] [2022-02-16 14:08:03,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:03,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:08:03,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:08:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:08:03,340 INFO L87 Difference]: Start difference. First operand 35462 states and 98063 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:08:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:04,118 INFO L93 Difference]: Finished difference Result 57759 states and 158154 transitions. [2022-02-16 14:08:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:08:04,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 27 [2022-02-16 14:08:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:04,305 INFO L225 Difference]: With dead ends: 57759 [2022-02-16 14:08:04,305 INFO L226 Difference]: Without dead ends: 57742 [2022-02-16 14:08:04,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=622, Invalid=1270, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:08:04,306 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 194 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:04,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 63 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57742 states. [2022-02-16 14:08:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57742 to 42348. [2022-02-16 14:08:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42348 states, 42347 states have (on average 2.7447753087585895) internal successors, (116233), 42347 states have internal predecessors, (116233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42348 states to 42348 states and 116233 transitions. [2022-02-16 14:08:05,618 INFO L78 Accepts]: Start accepts. Automaton has 42348 states and 116233 transitions. Word has length 27 [2022-02-16 14:08:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:05,618 INFO L470 AbstractCegarLoop]: Abstraction has 42348 states and 116233 transitions. [2022-02-16 14:08:05,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:08:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 42348 states and 116233 transitions. [2022-02-16 14:08:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:05,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:05,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:05,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:05,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:05,885 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash -779358302, now seen corresponding path program 51 times [2022-02-16 14:08:05,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:05,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019256357] [2022-02-16 14:08:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:05,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:05,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:05,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019256357] [2022-02-16 14:08:05,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019256357] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:05,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722199393] [2022-02-16 14:08:05,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:08:05,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:05,947 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) [2022-02-16 14:08:05,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-16 14:08:05,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:08:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:05,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:06,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:06,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722199393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:06,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:06,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-02-16 14:08:06,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699237956] [2022-02-16 14:08:06,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:06,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:08:06,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:08:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:08:06,150 INFO L87 Difference]: Start difference. First operand 42348 states and 116233 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-16 14:08:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:07,134 INFO L93 Difference]: Finished difference Result 67003 states and 182584 transitions. [2022-02-16 14:08:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 14:08:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 [2022-02-16 14:08:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:07,382 INFO L225 Difference]: With dead ends: 67003 [2022-02-16 14:08:07,382 INFO L226 Difference]: Without dead ends: 66973 [2022-02-16 14:08:07,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=552, Invalid=1340, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:08:07,383 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 194 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:07,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 97 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66973 states. [2022-02-16 14:08:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66973 to 35826. [2022-02-16 14:08:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35826 states, 35825 states have (on average 2.682707606420098) internal successors, (96108), 35825 states have internal predecessors, (96108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35826 states to 35826 states and 96108 transitions. [2022-02-16 14:08:08,701 INFO L78 Accepts]: Start accepts. Automaton has 35826 states and 96108 transitions. Word has length 27 [2022-02-16 14:08:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:08,701 INFO L470 AbstractCegarLoop]: Abstraction has 35826 states and 96108 transitions. [2022-02-16 14:08:08,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-16 14:08:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 35826 states and 96108 transitions. [2022-02-16 14:08:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:08,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:08,761 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:08,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:08,975 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,SelfDestructingSolverStorable84 [2022-02-16 14:08:08,975 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash -105316560, now seen corresponding path program 52 times [2022-02-16 14:08:08,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:08,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255837392] [2022-02-16 14:08:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:08,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:09,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:09,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255837392] [2022-02-16 14:08:09,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255837392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:09,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526894687] [2022-02-16 14:08:09,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:08:09,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:09,010 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) [2022-02-16 14:08:09,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-16 14:08:09,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:08:09,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:09,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:09,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526894687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:09,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:09,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-02-16 14:08:09,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853934590] [2022-02-16 14:08:09,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:09,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:08:09,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:08:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:08:09,212 INFO L87 Difference]: Start difference. First operand 35826 states and 96108 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:09,862 INFO L93 Difference]: Finished difference Result 37712 states and 99842 transitions. [2022-02-16 14:08:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 14:08:09,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:09,967 INFO L225 Difference]: With dead ends: 37712 [2022-02-16 14:08:09,968 INFO L226 Difference]: Without dead ends: 37683 [2022-02-16 14:08:09,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:08:09,968 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:09,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 77 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37683 states. [2022-02-16 14:08:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37683 to 34298. [2022-02-16 14:08:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34298 states, 34297 states have (on average 2.6908475959996503) internal successors, (92288), 34297 states have internal predecessors, (92288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34298 states to 34298 states and 92288 transitions. [2022-02-16 14:08:11,007 INFO L78 Accepts]: Start accepts. Automaton has 34298 states and 92288 transitions. Word has length 27 [2022-02-16 14:08:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:11,007 INFO L470 AbstractCegarLoop]: Abstraction has 34298 states and 92288 transitions. [2022-02-16 14:08:11,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 34298 states and 92288 transitions. [2022-02-16 14:08:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:11,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:11,061 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:11,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:11,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:11,271 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1543796876, now seen corresponding path program 16 times [2022-02-16 14:08:11,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:11,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493914810] [2022-02-16 14:08:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:11,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:11,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:11,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493914810] [2022-02-16 14:08:11,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493914810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:11,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46827322] [2022-02-16 14:08:11,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:08:11,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:11,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:11,382 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) [2022-02-16 14:08:11,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-16 14:08:11,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:08:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:08:11,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:11,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:11,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46827322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:11,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:11,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 14 [2022-02-16 14:08:11,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668220502] [2022-02-16 14:08:11,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:11,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:08:11,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:08:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:08:11,714 INFO L87 Difference]: Start difference. First operand 34298 states and 92288 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:12,187 INFO L93 Difference]: Finished difference Result 34407 states and 92458 transitions. [2022-02-16 14:08:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:08:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:12,289 INFO L225 Difference]: With dead ends: 34407 [2022-02-16 14:08:12,290 INFO L226 Difference]: Without dead ends: 34402 [2022-02-16 14:08:12,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:08:12,290 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:12,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 227 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:08:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34402 states. [2022-02-16 14:08:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34402 to 34299. [2022-02-16 14:08:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34299 states, 34298 states have (on average 2.6908274534958307) internal successors, (92290), 34298 states have internal predecessors, (92290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34299 states to 34299 states and 92290 transitions. [2022-02-16 14:08:13,151 INFO L78 Accepts]: Start accepts. Automaton has 34299 states and 92290 transitions. Word has length 27 [2022-02-16 14:08:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:13,151 INFO L470 AbstractCegarLoop]: Abstraction has 34299 states and 92290 transitions. [2022-02-16 14:08:13,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 34299 states and 92290 transitions. [2022-02-16 14:08:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:13,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:13,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:13,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:13,419 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1566779170, now seen corresponding path program 53 times [2022-02-16 14:08:13,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:13,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705596241] [2022-02-16 14:08:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:13,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:13,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:13,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705596241] [2022-02-16 14:08:13,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705596241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:13,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022821833] [2022-02-16 14:08:13,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:08:13,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:13,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:13,477 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) [2022-02-16 14:08:13,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-16 14:08:13,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:08:13,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:13,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:13,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:13,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022821833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:13,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:13,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-02-16 14:08:13,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546259576] [2022-02-16 14:08:13,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:13,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:08:13,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:08:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:08:13,710 INFO L87 Difference]: Start difference. First operand 34299 states and 92290 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:14,740 INFO L93 Difference]: Finished difference Result 71435 states and 194763 transitions. [2022-02-16 14:08:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:08:14,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:14,989 INFO L225 Difference]: With dead ends: 71435 [2022-02-16 14:08:14,989 INFO L226 Difference]: Without dead ends: 71435 [2022-02-16 14:08:14,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 14:08:14,989 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 227 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:14,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 113 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:08:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71435 states. [2022-02-16 14:08:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71435 to 36195. [2022-02-16 14:08:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36195 states, 36194 states have (on average 2.700475216886777) internal successors, (97741), 36194 states have internal predecessors, (97741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36195 states to 36195 states and 97741 transitions. [2022-02-16 14:08:16,430 INFO L78 Accepts]: Start accepts. Automaton has 36195 states and 97741 transitions. Word has length 27 [2022-02-16 14:08:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:16,430 INFO L470 AbstractCegarLoop]: Abstraction has 36195 states and 97741 transitions. [2022-02-16 14:08:16,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 36195 states and 97741 transitions. [2022-02-16 14:08:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:16,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:16,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:16,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-16 14:08:16,702 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash -619931660, now seen corresponding path program 54 times [2022-02-16 14:08:16,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:16,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526021335] [2022-02-16 14:08:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:16,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:16,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:16,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526021335] [2022-02-16 14:08:16,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526021335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:16,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738159438] [2022-02-16 14:08:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:08:16,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:16,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:16,734 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) [2022-02-16 14:08:16,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-16 14:08:16,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:08:16,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:16,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:16,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:16,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:16,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738159438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:16,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:16,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-02-16 14:08:16,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997553545] [2022-02-16 14:08:16,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:16,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:08:16,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:08:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:08:16,989 INFO L87 Difference]: Start difference. First operand 36195 states and 97741 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:17,694 INFO L93 Difference]: Finished difference Result 39066 states and 104186 transitions. [2022-02-16 14:08:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:08:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:17,814 INFO L225 Difference]: With dead ends: 39066 [2022-02-16 14:08:17,814 INFO L226 Difference]: Without dead ends: 39041 [2022-02-16 14:08:17,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=943, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:08:17,815 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 128 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:17,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 97 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39041 states. [2022-02-16 14:08:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39041 to 37192. [2022-02-16 14:08:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37192 states, 37191 states have (on average 2.697292355677449) internal successors, (100315), 37191 states have internal predecessors, (100315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37192 states to 37192 states and 100315 transitions. [2022-02-16 14:08:18,824 INFO L78 Accepts]: Start accepts. Automaton has 37192 states and 100315 transitions. Word has length 27 [2022-02-16 14:08:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:18,824 INFO L470 AbstractCegarLoop]: Abstraction has 37192 states and 100315 transitions. [2022-02-16 14:08:18,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 37192 states and 100315 transitions. [2022-02-16 14:08:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:18,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:18,883 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:18,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:19,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:19,091 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash 169632056, now seen corresponding path program 17 times [2022-02-16 14:08:19,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:19,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997126300] [2022-02-16 14:08:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:19,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:19,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:19,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997126300] [2022-02-16 14:08:19,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997126300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:19,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057377612] [2022-02-16 14:08:19,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:08:19,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:19,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:19,208 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) [2022-02-16 14:08:19,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-16 14:08:19,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:08:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:08:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:19,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:19,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057377612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:19,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:19,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2022-02-16 14:08:19,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365612945] [2022-02-16 14:08:19,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:19,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:08:19,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:08:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:08:19,574 INFO L87 Difference]: Start difference. First operand 37192 states and 100315 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:19,902 INFO L93 Difference]: Finished difference Result 37347 states and 100552 transitions. [2022-02-16 14:08:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:08:19,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:20,004 INFO L225 Difference]: With dead ends: 37347 [2022-02-16 14:08:20,004 INFO L226 Difference]: Without dead ends: 37342 [2022-02-16 14:08:20,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:08:20,004 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:20,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 263 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:08:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2022-02-16 14:08:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 37193. [2022-02-16 14:08:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37193 states, 37192 states have (on average 2.6973273822327384) internal successors, (100319), 37192 states have internal predecessors, (100319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37193 states to 37193 states and 100319 transitions. [2022-02-16 14:08:21,026 INFO L78 Accepts]: Start accepts. Automaton has 37193 states and 100319 transitions. Word has length 27 [2022-02-16 14:08:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:21,026 INFO L470 AbstractCegarLoop]: Abstraction has 37193 states and 100319 transitions. [2022-02-16 14:08:21,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 37193 states and 100319 transitions. [2022-02-16 14:08:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:21,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:21,086 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:21,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-16 14:08:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:21,291 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1821307162, now seen corresponding path program 55 times [2022-02-16 14:08:21,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:21,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305700854] [2022-02-16 14:08:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:21,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:21,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:21,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305700854] [2022-02-16 14:08:21,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305700854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:21,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10132368] [2022-02-16 14:08:21,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:08:21,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:21,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:21,319 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) [2022-02-16 14:08:21,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-16 14:08:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:21,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:08:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:21,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:21,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10132368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:21,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:21,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2022-02-16 14:08:21,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301362827] [2022-02-16 14:08:21,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:21,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:08:21,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:08:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:08:21,703 INFO L87 Difference]: Start difference. First operand 37193 states and 100319 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:22,115 INFO L93 Difference]: Finished difference Result 37800 states and 101483 transitions. [2022-02-16 14:08:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:08:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:22,223 INFO L225 Difference]: With dead ends: 37800 [2022-02-16 14:08:22,223 INFO L226 Difference]: Without dead ends: 37789 [2022-02-16 14:08:22,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=543, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:08:22,223 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:22,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 75 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37789 states. [2022-02-16 14:08:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37789 to 37432. [2022-02-16 14:08:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 2.6956800512943815) internal successors, (100902), 37431 states have internal predecessors, (100902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 100902 transitions. [2022-02-16 14:08:23,167 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 100902 transitions. Word has length 27 [2022-02-16 14:08:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:23,167 INFO L470 AbstractCegarLoop]: Abstraction has 37432 states and 100902 transitions. [2022-02-16 14:08:23,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 100902 transitions. [2022-02-16 14:08:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:23,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:23,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:23,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-16 14:08:23,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:23,442 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:23,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1774329468, now seen corresponding path program 56 times [2022-02-16 14:08:23,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:23,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926301014] [2022-02-16 14:08:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:23,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:23,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:23,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926301014] [2022-02-16 14:08:23,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926301014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:23,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530782241] [2022-02-16 14:08:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:08:23,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:23,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:23,492 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) [2022-02-16 14:08:23,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-16 14:08:23,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:08:23,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:23,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:23,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:23,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530782241] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:23,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:23,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-02-16 14:08:23,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492825569] [2022-02-16 14:08:23,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:23,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:08:23,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:08:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:08:23,761 INFO L87 Difference]: Start difference. First operand 37432 states and 100902 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:24,369 INFO L93 Difference]: Finished difference Result 39240 states and 104685 transitions. [2022-02-16 14:08:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:08:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:24,482 INFO L225 Difference]: With dead ends: 39240 [2022-02-16 14:08:24,482 INFO L226 Difference]: Without dead ends: 39234 [2022-02-16 14:08:24,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=417, Invalid=915, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:08:24,483 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 121 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:24,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 138 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39234 states. [2022-02-16 14:08:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39234 to 37427. [2022-02-16 14:08:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37427 states, 37426 states have (on average 2.6957997114305563) internal successors, (100893), 37426 states have internal predecessors, (100893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37427 states to 37427 states and 100893 transitions. [2022-02-16 14:08:25,556 INFO L78 Accepts]: Start accepts. Automaton has 37427 states and 100893 transitions. Word has length 27 [2022-02-16 14:08:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:25,556 INFO L470 AbstractCegarLoop]: Abstraction has 37427 states and 100893 transitions. [2022-02-16 14:08:25,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 37427 states and 100893 transitions. [2022-02-16 14:08:25,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:25,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:25,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:25,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:25,831 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,SelfDestructingSolverStorable91 [2022-02-16 14:08:25,832 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1477516996, now seen corresponding path program 57 times [2022-02-16 14:08:25,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:25,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866787724] [2022-02-16 14:08:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:25,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:25,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:25,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866787724] [2022-02-16 14:08:25,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866787724] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:25,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970387806] [2022-02-16 14:08:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:08:25,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:25,893 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) [2022-02-16 14:08:25,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-16 14:08:25,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:08:25,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:25,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:26,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:26,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970387806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:26,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:26,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-02-16 14:08:26,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587881366] [2022-02-16 14:08:26,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:26,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:08:26,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:08:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:08:26,142 INFO L87 Difference]: Start difference. First operand 37427 states and 100893 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:08:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:27,183 INFO L93 Difference]: Finished difference Result 85938 states and 240348 transitions. [2022-02-16 14:08:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:08:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 27 [2022-02-16 14:08:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:27,483 INFO L225 Difference]: With dead ends: 85938 [2022-02-16 14:08:27,483 INFO L226 Difference]: Without dead ends: 85938 [2022-02-16 14:08:27,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1430, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:08:27,484 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 224 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:27,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 114 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85938 states. [2022-02-16 14:08:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85938 to 36645. [2022-02-16 14:08:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36645 states, 36644 states have (on average 2.692937452243205) internal successors, (98680), 36644 states have internal predecessors, (98680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36645 states to 36645 states and 98680 transitions. [2022-02-16 14:08:29,299 INFO L78 Accepts]: Start accepts. Automaton has 36645 states and 98680 transitions. Word has length 27 [2022-02-16 14:08:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:29,299 INFO L470 AbstractCegarLoop]: Abstraction has 36645 states and 98680 transitions. [2022-02-16 14:08:29,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:08:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 36645 states and 98680 transitions. [2022-02-16 14:08:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:29,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:29,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:29,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:29,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:29,571 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1936776188, now seen corresponding path program 18 times [2022-02-16 14:08:29,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:29,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988067542] [2022-02-16 14:08:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:29,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:29,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:29,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988067542] [2022-02-16 14:08:29,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988067542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:29,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447492415] [2022-02-16 14:08:29,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:08:29,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:29,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:29,706 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) [2022-02-16 14:08:29,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:08:29,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:08:29,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:29,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-16 14:08:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:29,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:30,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447492415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:30,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:30,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-02-16 14:08:30,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429007810] [2022-02-16 14:08:30,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:30,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:08:30,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:08:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:08:30,098 INFO L87 Difference]: Start difference. First operand 36645 states and 98680 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-16 14:08:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:30,457 INFO L93 Difference]: Finished difference Result 36787 states and 98908 transitions. [2022-02-16 14:08:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:08:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 [2022-02-16 14:08:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:30,563 INFO L225 Difference]: With dead ends: 36787 [2022-02-16 14:08:30,563 INFO L226 Difference]: Without dead ends: 36782 [2022-02-16 14:08:30,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:08:30,563 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 59 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:30,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 287 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36782 states. [2022-02-16 14:08:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36782 to 36666. [2022-02-16 14:08:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36666 states, 36665 states have (on average 2.6926223919269057) internal successors, (98725), 36665 states have internal predecessors, (98725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36666 states to 36666 states and 98725 transitions. [2022-02-16 14:08:31,498 INFO L78 Accepts]: Start accepts. Automaton has 36666 states and 98725 transitions. Word has length 27 [2022-02-16 14:08:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:31,498 INFO L470 AbstractCegarLoop]: Abstraction has 36666 states and 98725 transitions. [2022-02-16 14:08:31,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-16 14:08:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36666 states and 98725 transitions. [2022-02-16 14:08:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:31,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:31,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:31,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:31,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:31,776 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1964763648, now seen corresponding path program 58 times [2022-02-16 14:08:31,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:31,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873208017] [2022-02-16 14:08:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:31,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:31,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:31,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873208017] [2022-02-16 14:08:31,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873208017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:31,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638755887] [2022-02-16 14:08:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:08:31,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:31,807 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) [2022-02-16 14:08:31,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-16 14:08:31,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:08:31,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:08:31,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:31,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:32,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638755887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:32,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:32,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-02-16 14:08:32,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841583537] [2022-02-16 14:08:32,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:32,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:08:32,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:08:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:08:32,012 INFO L87 Difference]: Start difference. First operand 36666 states and 98725 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-02-16 14:08:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:32,500 INFO L93 Difference]: Finished difference Result 37017 states and 99263 transitions. [2022-02-16 14:08:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:08:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 [2022-02-16 14:08:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:32,588 INFO L225 Difference]: With dead ends: 37017 [2022-02-16 14:08:32,588 INFO L226 Difference]: Without dead ends: 37017 [2022-02-16 14:08:32,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:08:32,588 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:32,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 82 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:08:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37017 states. [2022-02-16 14:08:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37017 to 36682. [2022-02-16 14:08:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36682 states, 36681 states have (on average 2.692293012731387) internal successors, (98756), 36681 states have internal predecessors, (98756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36682 states to 36682 states and 98756 transitions. [2022-02-16 14:08:33,476 INFO L78 Accepts]: Start accepts. Automaton has 36682 states and 98756 transitions. Word has length 27 [2022-02-16 14:08:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:33,476 INFO L470 AbstractCegarLoop]: Abstraction has 36682 states and 98756 transitions. [2022-02-16 14:08:33,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-02-16 14:08:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 36682 states and 98756 transitions. [2022-02-16 14:08:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:33,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:33,664 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:33,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:33,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:33,879 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1700909956, now seen corresponding path program 59 times [2022-02-16 14:08:33,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:33,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085454639] [2022-02-16 14:08:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:33,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:33,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:33,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085454639] [2022-02-16 14:08:33,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085454639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:33,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564565065] [2022-02-16 14:08:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:08:33,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:33,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:33,922 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) [2022-02-16 14:08:33,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-16 14:08:33,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:08:33,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:33,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:34,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:34,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564565065] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:34,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:34,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 19 [2022-02-16 14:08:34,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545659489] [2022-02-16 14:08:34,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:34,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:08:34,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:34,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:08:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:08:34,154 INFO L87 Difference]: Start difference. First operand 36682 states and 98756 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:34,610 INFO L93 Difference]: Finished difference Result 38434 states and 102259 transitions. [2022-02-16 14:08:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:08:34,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:34,710 INFO L225 Difference]: With dead ends: 38434 [2022-02-16 14:08:34,710 INFO L226 Difference]: Without dead ends: 38434 [2022-02-16 14:08:34,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:08:34,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:34,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 86 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38434 states. [2022-02-16 14:08:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38434 to 36569. [2022-02-16 14:08:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36569 states, 36568 states have (on average 2.69290089695909) internal successors, (98474), 36568 states have internal predecessors, (98474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36569 states to 36569 states and 98474 transitions. [2022-02-16 14:08:35,619 INFO L78 Accepts]: Start accepts. Automaton has 36569 states and 98474 transitions. Word has length 27 [2022-02-16 14:08:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:35,619 INFO L470 AbstractCegarLoop]: Abstraction has 36569 states and 98474 transitions. [2022-02-16 14:08:35,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36569 states and 98474 transitions. [2022-02-16 14:08:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:35,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:35,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:35,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:35,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:35,889 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2028791672, now seen corresponding path program 60 times [2022-02-16 14:08:35,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:35,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024867500] [2022-02-16 14:08:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:35,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:35,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:35,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024867500] [2022-02-16 14:08:35,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024867500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:35,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360251416] [2022-02-16 14:08:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:08:35,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:35,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:35,965 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) [2022-02-16 14:08:35,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-16 14:08:35,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:08:35,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:08:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:36,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:36,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360251416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:36,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:36,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-02-16 14:08:36,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947860357] [2022-02-16 14:08:36,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:36,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:08:36,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:36,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:08:36,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:08:36,210 INFO L87 Difference]: Start difference. First operand 36569 states and 98474 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-16 14:08:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:37,885 INFO L93 Difference]: Finished difference Result 87544 states and 232908 transitions. [2022-02-16 14:08:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-16 14:08:37,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 27 [2022-02-16 14:08:37,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:38,191 INFO L225 Difference]: With dead ends: 87544 [2022-02-16 14:08:38,192 INFO L226 Difference]: Without dead ends: 87544 [2022-02-16 14:08:38,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1679, Invalid=4173, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:08:38,193 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 376 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:38,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 179 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:08:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87544 states. [2022-02-16 14:08:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87544 to 49743. [2022-02-16 14:08:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49743 states, 49742 states have (on average 2.675023119295565) internal successors, (133061), 49742 states have internal predecessors, (133061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49743 states to 49743 states and 133061 transitions. [2022-02-16 14:08:40,065 INFO L78 Accepts]: Start accepts. Automaton has 49743 states and 133061 transitions. Word has length 27 [2022-02-16 14:08:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:40,066 INFO L470 AbstractCegarLoop]: Abstraction has 49743 states and 133061 transitions. [2022-02-16 14:08:40,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-16 14:08:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 49743 states and 133061 transitions. [2022-02-16 14:08:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:40,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:40,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:40,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:40,351 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,SelfDestructingSolverStorable96 [2022-02-16 14:08:40,351 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:40,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash -72479184, now seen corresponding path program 61 times [2022-02-16 14:08:40,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:40,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524844757] [2022-02-16 14:08:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:40,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:40,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:40,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524844757] [2022-02-16 14:08:40,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524844757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:40,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593553125] [2022-02-16 14:08:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:08:40,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:40,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:40,408 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) [2022-02-16 14:08:40,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-16 14:08:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:08:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:40,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:40,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593553125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:40,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:40,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-16 14:08:40,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048309880] [2022-02-16 14:08:40,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:40,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:08:40,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:08:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:08:40,814 INFO L87 Difference]: Start difference. First operand 49743 states and 133061 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:08:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:41,265 INFO L93 Difference]: Finished difference Result 51347 states and 136503 transitions. [2022-02-16 14:08:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:08:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 27 [2022-02-16 14:08:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:41,416 INFO L225 Difference]: With dead ends: 51347 [2022-02-16 14:08:41,416 INFO L226 Difference]: Without dead ends: 51346 [2022-02-16 14:08:41,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:08:41,417 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:41,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 152 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:08:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51346 states. [2022-02-16 14:08:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51346 to 49734. [2022-02-16 14:08:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49734 states, 49733 states have (on average 2.675024631532383) internal successors, (133037), 49733 states have internal predecessors, (133037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49734 states to 49734 states and 133037 transitions. [2022-02-16 14:08:42,823 INFO L78 Accepts]: Start accepts. Automaton has 49734 states and 133037 transitions. Word has length 27 [2022-02-16 14:08:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:42,823 INFO L470 AbstractCegarLoop]: Abstraction has 49734 states and 133037 transitions. [2022-02-16 14:08:42,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:08:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 49734 states and 133037 transitions. [2022-02-16 14:08:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:43,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:43,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:43,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:43,283 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,SelfDestructingSolverStorable97 [2022-02-16 14:08:43,283 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash 935560500, now seen corresponding path program 62 times [2022-02-16 14:08:43,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:43,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243638873] [2022-02-16 14:08:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:43,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:43,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:43,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243638873] [2022-02-16 14:08:43,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243638873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:43,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191445174] [2022-02-16 14:08:43,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:08:43,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:43,359 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) [2022-02-16 14:08:43,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-16 14:08:43,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:08:43,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:43,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:08:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:43,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:43,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191445174] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:43,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:43,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-16 14:08:43,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469420005] [2022-02-16 14:08:43,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:08:43,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:08:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:08:43,758 INFO L87 Difference]: Start difference. First operand 49734 states and 133037 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:44,856 INFO L93 Difference]: Finished difference Result 65021 states and 181332 transitions. [2022-02-16 14:08:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:08:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:45,262 INFO L225 Difference]: With dead ends: 65021 [2022-02-16 14:08:45,262 INFO L226 Difference]: Without dead ends: 65013 [2022-02-16 14:08:45,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=1690, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 14:08:45,262 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 345 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:45,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 106 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:08:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65013 states. [2022-02-16 14:08:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65013 to 50814. [2022-02-16 14:08:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50814 states, 50813 states have (on average 2.678330348532856) internal successors, (136094), 50813 states have internal predecessors, (136094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50814 states to 50814 states and 136094 transitions. [2022-02-16 14:08:46,742 INFO L78 Accepts]: Start accepts. Automaton has 50814 states and 136094 transitions. Word has length 27 [2022-02-16 14:08:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:46,742 INFO L470 AbstractCegarLoop]: Abstraction has 50814 states and 136094 transitions. [2022-02-16 14:08:46,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 50814 states and 136094 transitions. [2022-02-16 14:08:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:46,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:46,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:46,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:47,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:47,019 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash 25955542, now seen corresponding path program 63 times [2022-02-16 14:08:47,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:47,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515148590] [2022-02-16 14:08:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:47,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:47,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:47,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515148590] [2022-02-16 14:08:47,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515148590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:47,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995366984] [2022-02-16 14:08:47,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:08:47,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:47,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:47,179 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:08:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:08:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:47,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-16 14:08:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:08:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:47,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:48,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995366984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:48,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:48,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 14:08:48,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887401732] [2022-02-16 14:08:48,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:48,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:08:48,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:08:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:08:48,325 INFO L87 Difference]: Start difference. First operand 50814 states and 136094 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:52,930 INFO L93 Difference]: Finished difference Result 59108 states and 160480 transitions. [2022-02-16 14:08:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-16 14:08:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:08:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:53,116 INFO L225 Difference]: With dead ends: 59108 [2022-02-16 14:08:53,116 INFO L226 Difference]: Without dead ends: 59032 [2022-02-16 14:08:53,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1095, Invalid=4455, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:08:53,117 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 380 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:53,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 188 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:08:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59032 states. [2022-02-16 14:08:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59032 to 51840. [2022-02-16 14:08:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51840 states, 51839 states have (on average 2.678851829703505) internal successors, (138869), 51839 states have internal predecessors, (138869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51840 states to 51840 states and 138869 transitions. [2022-02-16 14:08:54,635 INFO L78 Accepts]: Start accepts. Automaton has 51840 states and 138869 transitions. Word has length 27 [2022-02-16 14:08:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:54,635 INFO L470 AbstractCegarLoop]: Abstraction has 51840 states and 138869 transitions. [2022-02-16 14:08:54,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 51840 states and 138869 transitions. [2022-02-16 14:08:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:54,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:54,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:54,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-02-16 14:08:54,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:54,915 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:54,916 INFO L85 PathProgramCache]: Analyzing trace with hash 933231540, now seen corresponding path program 64 times [2022-02-16 14:08:54,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:54,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344033113] [2022-02-16 14:08:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:54,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:54,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:54,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344033113] [2022-02-16 14:08:54,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344033113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:54,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86703193] [2022-02-16 14:08:54,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:08:54,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:54,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:54,988 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:08:54,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-16 14:08:55,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:08:55,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:08:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:55,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:55,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86703193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:55,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:55,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2022-02-16 14:08:55,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973857515] [2022-02-16 14:08:55,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:55,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:08:55,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:08:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:08:55,391 INFO L87 Difference]: Start difference. First operand 51840 states and 138869 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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) [2022-02-16 14:08:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:56,832 INFO L93 Difference]: Finished difference Result 75158 states and 204124 transitions. [2022-02-16 14:08:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 14:08:56,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 [2022-02-16 14:08:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:57,071 INFO L225 Difference]: With dead ends: 75158 [2022-02-16 14:08:57,071 INFO L226 Difference]: Without dead ends: 75142 [2022-02-16 14:08:57,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=442, Invalid=1814, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 14:08:57,071 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:57,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 192 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:08:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75142 states. [2022-02-16 14:08:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75142 to 53414. [2022-02-16 14:08:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53414 states, 53413 states have (on average 2.6879785819931477) internal successors, (143573), 53413 states have internal predecessors, (143573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53414 states to 53414 states and 143573 transitions. [2022-02-16 14:08:58,687 INFO L78 Accepts]: Start accepts. Automaton has 53414 states and 143573 transitions. Word has length 27 [2022-02-16 14:08:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:58,688 INFO L470 AbstractCegarLoop]: Abstraction has 53414 states and 143573 transitions. [2022-02-16 14:08:58,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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) [2022-02-16 14:08:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 53414 states and 143573 transitions. [2022-02-16 14:08:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:08:58,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:58,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:58,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:59,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-16 14:08:59,147 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1318772010, now seen corresponding path program 65 times [2022-02-16 14:08:59,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:59,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876755978] [2022-02-16 14:08:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:59,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:59,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876755978] [2022-02-16 14:08:59,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876755978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007192360] [2022-02-16 14:08:59,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:08:59,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:59,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:59,264 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:08:59,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-16 14:08:59,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:08:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:59,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:08:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:59,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:00,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007192360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:00,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:00,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-16 14:09:00,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135350833] [2022-02-16 14:09:00,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:00,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:09:00,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:09:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:09:00,043 INFO L87 Difference]: Start difference. First operand 53414 states and 143573 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:04,285 INFO L93 Difference]: Finished difference Result 61216 states and 162051 transitions. [2022-02-16 14:09:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-16 14:09:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:09:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:04,478 INFO L225 Difference]: With dead ends: 61216 [2022-02-16 14:09:04,478 INFO L226 Difference]: Without dead ends: 61113 [2022-02-16 14:09:04,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2243 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1266, Invalid=5706, Unknown=0, NotChecked=0, Total=6972 [2022-02-16 14:09:04,480 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 376 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:04,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 234 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:09:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61113 states. [2022-02-16 14:09:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61113 to 54838. [2022-02-16 14:09:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54838 states, 54837 states have (on average 2.6957893393146963) internal successors, (147829), 54837 states have internal predecessors, (147829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54838 states to 54838 states and 147829 transitions. [2022-02-16 14:09:06,002 INFO L78 Accepts]: Start accepts. Automaton has 54838 states and 147829 transitions. Word has length 27 [2022-02-16 14:09:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:06,002 INFO L470 AbstractCegarLoop]: Abstraction has 54838 states and 147829 transitions. [2022-02-16 14:09:06,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 54838 states and 147829 transitions. [2022-02-16 14:09:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:06,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:06,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:06,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:06,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:06,483 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1304899020, now seen corresponding path program 66 times [2022-02-16 14:09:06,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:06,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505891286] [2022-02-16 14:09:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:06,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:06,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:06,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505891286] [2022-02-16 14:09:06,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505891286] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:06,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115100981] [2022-02-16 14:09:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:09:06,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:06,546 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-16 14:09:06,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:09:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:09:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:06,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:06,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115100981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:06,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:06,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-16 14:09:06,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880617587] [2022-02-16 14:09:06,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:09:06,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:09:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:09:06,924 INFO L87 Difference]: Start difference. First operand 54838 states and 147829 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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) [2022-02-16 14:09:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:07,852 INFO L93 Difference]: Finished difference Result 66750 states and 181711 transitions. [2022-02-16 14:09:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 14:09:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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 [2022-02-16 14:09:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:08,290 INFO L225 Difference]: With dead ends: 66750 [2022-02-16 14:09:08,290 INFO L226 Difference]: Without dead ends: 66750 [2022-02-16 14:09:08,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=1709, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 14:09:08,291 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 224 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:08,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 81 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:09:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66750 states. [2022-02-16 14:09:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66750 to 55420. [2022-02-16 14:09:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55420 states, 55419 states have (on average 2.7027553727061115) internal successors, (149784), 55419 states have internal predecessors, (149784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55420 states to 55420 states and 149784 transitions. [2022-02-16 14:09:09,741 INFO L78 Accepts]: Start accepts. Automaton has 55420 states and 149784 transitions. Word has length 27 [2022-02-16 14:09:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:09,741 INFO L470 AbstractCegarLoop]: Abstraction has 55420 states and 149784 transitions. [2022-02-16 14:09:09,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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) [2022-02-16 14:09:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 55420 states and 149784 transitions. [2022-02-16 14:09:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:09,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:09,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:09,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:10,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-16 14:09:10,019 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:10,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:10,020 INFO L85 PathProgramCache]: Analyzing trace with hash -816793386, now seen corresponding path program 67 times [2022-02-16 14:09:10,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:10,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798638186] [2022-02-16 14:09:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:10,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:10,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:10,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798638186] [2022-02-16 14:09:10,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798638186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:10,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496767647] [2022-02-16 14:09:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:09:10,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:10,154 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:10,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-16 14:09:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:09:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:10,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:11,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496767647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:11,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:11,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-16 14:09:11,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329121374] [2022-02-16 14:09:11,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:11,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:09:11,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:09:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:09:11,419 INFO L87 Difference]: Start difference. First operand 55420 states and 149784 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:14,214 INFO L93 Difference]: Finished difference Result 57579 states and 154256 transitions. [2022-02-16 14:09:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:09:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:09:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:14,389 INFO L225 Difference]: With dead ends: 57579 [2022-02-16 14:09:14,389 INFO L226 Difference]: Without dead ends: 57534 [2022-02-16 14:09:14,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 14:09:14,390 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 386 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:14,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 147 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:09:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57534 states. [2022-02-16 14:09:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57534 to 55605. [2022-02-16 14:09:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55605 states, 55604 states have (on average 2.7038702251636573) internal successors, (150346), 55604 states have internal predecessors, (150346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55605 states to 55605 states and 150346 transitions. [2022-02-16 14:09:15,964 INFO L78 Accepts]: Start accepts. Automaton has 55605 states and 150346 transitions. Word has length 27 [2022-02-16 14:09:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:15,964 INFO L470 AbstractCegarLoop]: Abstraction has 55605 states and 150346 transitions. [2022-02-16 14:09:15,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 55605 states and 150346 transitions. [2022-02-16 14:09:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:16,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:16,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:16,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-16 14:09:16,303 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1866169574, now seen corresponding path program 68 times [2022-02-16 14:09:16,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:16,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700338086] [2022-02-16 14:09:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:16,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:16,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:16,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700338086] [2022-02-16 14:09:16,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700338086] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:16,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231921465] [2022-02-16 14:09:16,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:09:16,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:16,395 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:16,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-16 14:09:16,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:09:16,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:16,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:09:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:16,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:16,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231921465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:16,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:16,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2022-02-16 14:09:16,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811574203] [2022-02-16 14:09:16,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:16,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:09:16,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:16,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:09:16,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:09:16,691 INFO L87 Difference]: Start difference. First operand 55605 states and 150346 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:18,095 INFO L93 Difference]: Finished difference Result 72736 states and 200103 transitions. [2022-02-16 14:09:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:09:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:09:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:18,334 INFO L225 Difference]: With dead ends: 72736 [2022-02-16 14:09:18,334 INFO L226 Difference]: Without dead ends: 72736 [2022-02-16 14:09:18,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=768, Invalid=3138, Unknown=0, NotChecked=0, Total=3906 [2022-02-16 14:09:18,335 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 306 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:18,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 165 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:09:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72736 states. [2022-02-16 14:09:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72736 to 56185. [2022-02-16 14:09:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56185 states, 56184 states have (on average 2.7078527694717356) internal successors, (152138), 56184 states have internal predecessors, (152138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56185 states to 56185 states and 152138 transitions. [2022-02-16 14:09:19,842 INFO L78 Accepts]: Start accepts. Automaton has 56185 states and 152138 transitions. Word has length 27 [2022-02-16 14:09:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:19,843 INFO L470 AbstractCegarLoop]: Abstraction has 56185 states and 152138 transitions. [2022-02-16 14:09:19,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 56185 states and 152138 transitions. [2022-02-16 14:09:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:20,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:20,108 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:20,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:20,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-16 14:09:20,331 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:20,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1350603728, now seen corresponding path program 69 times [2022-02-16 14:09:20,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:20,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207981967] [2022-02-16 14:09:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:20,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:20,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:20,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207981967] [2022-02-16 14:09:20,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207981967] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:20,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759934797] [2022-02-16 14:09:20,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:09:20,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:20,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:20,361 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:20,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-16 14:09:20,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:09:20,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:20,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:09:20,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:20,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:20,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759934797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:20,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:20,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 17 [2022-02-16 14:09:20,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009768292] [2022-02-16 14:09:20,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:20,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 14:09:20,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 14:09:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-02-16 14:09:20,510 INFO L87 Difference]: Start difference. First operand 56185 states and 152138 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:20,979 INFO L93 Difference]: Finished difference Result 59425 states and 158981 transitions. [2022-02-16 14:09:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:09:20,980 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:09:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:21,173 INFO L225 Difference]: With dead ends: 59425 [2022-02-16 14:09:21,173 INFO L226 Difference]: Without dead ends: 59414 [2022-02-16 14:09:21,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:09:21,174 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:21,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 82 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:09:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59414 states. [2022-02-16 14:09:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59414 to 56215. [2022-02-16 14:09:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56215 states, 56214 states have (on average 2.707243747109261) internal successors, (152185), 56214 states have internal predecessors, (152185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56215 states to 56215 states and 152185 transitions. [2022-02-16 14:09:22,960 INFO L78 Accepts]: Start accepts. Automaton has 56215 states and 152185 transitions. Word has length 27 [2022-02-16 14:09:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:22,960 INFO L470 AbstractCegarLoop]: Abstraction has 56215 states and 152185 transitions. [2022-02-16 14:09:22,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 56215 states and 152185 transitions. [2022-02-16 14:09:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:23,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:23,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:23,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-16 14:09:23,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:23,254 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash 583628134, now seen corresponding path program 70 times [2022-02-16 14:09:23,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:23,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478294274] [2022-02-16 14:09:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:23,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:23,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:23,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478294274] [2022-02-16 14:09:23,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478294274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:23,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199803934] [2022-02-16 14:09:23,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:09:23,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:23,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:23,292 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:23,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-16 14:09:23,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:09:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:09:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:23,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:23,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199803934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:23,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:23,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-16 14:09:23,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810041627] [2022-02-16 14:09:23,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:23,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:09:23,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:09:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:09:23,584 INFO L87 Difference]: Start difference. First operand 56215 states and 152185 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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) [2022-02-16 14:09:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:24,823 INFO L93 Difference]: Finished difference Result 69801 states and 191091 transitions. [2022-02-16 14:09:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 14:09:24,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 [2022-02-16 14:09:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:25,051 INFO L225 Difference]: With dead ends: 69801 [2022-02-16 14:09:25,051 INFO L226 Difference]: Without dead ends: 69775 [2022-02-16 14:09:25,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=604, Invalid=2588, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:09:25,051 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 327 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:25,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 115 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:09:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69775 states. [2022-02-16 14:09:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69775 to 56405. [2022-02-16 14:09:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56405 states, 56404 states have (on average 2.708283100489327) internal successors, (152758), 56404 states have internal predecessors, (152758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56405 states to 56405 states and 152758 transitions. [2022-02-16 14:09:26,922 INFO L78 Accepts]: Start accepts. Automaton has 56405 states and 152758 transitions. Word has length 27 [2022-02-16 14:09:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:26,922 INFO L470 AbstractCegarLoop]: Abstraction has 56405 states and 152758 transitions. [2022-02-16 14:09:26,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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) [2022-02-16 14:09:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 56405 states and 152758 transitions. [2022-02-16 14:09:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:27,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:27,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:27,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-16 14:09:27,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:27,216 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash -92566042, now seen corresponding path program 71 times [2022-02-16 14:09:27,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:27,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105240088] [2022-02-16 14:09:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:27,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:27,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:27,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105240088] [2022-02-16 14:09:27,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105240088] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:27,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189429103] [2022-02-16 14:09:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:09:27,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:27,267 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:27,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-16 14:09:27,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:09:27,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:27,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:09:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:27,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:27,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189429103] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:27,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:27,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2022-02-16 14:09:27,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340135644] [2022-02-16 14:09:27,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:27,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:09:27,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:09:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:09:27,577 INFO L87 Difference]: Start difference. First operand 56405 states and 152758 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-02-16 14:09:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:29,518 INFO L93 Difference]: Finished difference Result 73437 states and 198515 transitions. [2022-02-16 14:09:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:09:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 [2022-02-16 14:09:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:29,721 INFO L225 Difference]: With dead ends: 73437 [2022-02-16 14:09:29,721 INFO L226 Difference]: Without dead ends: 73414 [2022-02-16 14:09:29,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=831, Invalid=3459, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:09:29,722 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 320 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:29,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 135 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:09:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73414 states. [2022-02-16 14:09:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73414 to 58152. [2022-02-16 14:09:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58152 states, 58151 states have (on average 2.718181974514626) internal successors, (158065), 58151 states have internal predecessors, (158065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58152 states to 58152 states and 158065 transitions. [2022-02-16 14:09:31,568 INFO L78 Accepts]: Start accepts. Automaton has 58152 states and 158065 transitions. Word has length 27 [2022-02-16 14:09:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:31,568 INFO L470 AbstractCegarLoop]: Abstraction has 58152 states and 158065 transitions. [2022-02-16 14:09:31,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-02-16 14:09:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58152 states and 158065 transitions. [2022-02-16 14:09:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:31,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:31,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:31,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-16 14:09:31,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-16 14:09:31,864 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -601462528, now seen corresponding path program 72 times [2022-02-16 14:09:31,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:31,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927250686] [2022-02-16 14:09:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:31,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:31,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:31,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927250686] [2022-02-16 14:09:31,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927250686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:31,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344044731] [2022-02-16 14:09:31,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:09:31,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:31,928 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:31,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-16 14:09:31,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:09:31,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:31,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:09:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:32,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:32,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344044731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:32,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:32,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2022-02-16 14:09:32,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100628359] [2022-02-16 14:09:32,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:32,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:09:32,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:32,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:09:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:09:32,279 INFO L87 Difference]: Start difference. First operand 58152 states and 158065 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:34,655 INFO L93 Difference]: Finished difference Result 78329 states and 211087 transitions. [2022-02-16 14:09:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-16 14:09:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:09:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:34,920 INFO L225 Difference]: With dead ends: 78329 [2022-02-16 14:09:34,920 INFO L226 Difference]: Without dead ends: 78329 [2022-02-16 14:09:34,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2572 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1405, Invalid=5735, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:09:34,921 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 388 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:34,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 146 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:09:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78329 states. [2022-02-16 14:09:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78329 to 63148. [2022-02-16 14:09:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63148 states, 63147 states have (on average 2.740114336389694) internal successors, (173030), 63147 states have internal predecessors, (173030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63148 states to 63148 states and 173030 transitions. [2022-02-16 14:09:36,843 INFO L78 Accepts]: Start accepts. Automaton has 63148 states and 173030 transitions. Word has length 27 [2022-02-16 14:09:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:36,844 INFO L470 AbstractCegarLoop]: Abstraction has 63148 states and 173030 transitions. [2022-02-16 14:09:36,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 63148 states and 173030 transitions. [2022-02-16 14:09:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:36,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:36,951 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:36,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-16 14:09:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:37,167 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash 893982016, now seen corresponding path program 73 times [2022-02-16 14:09:37,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:37,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623420410] [2022-02-16 14:09:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:37,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:37,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:37,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623420410] [2022-02-16 14:09:37,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623420410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:37,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605566246] [2022-02-16 14:09:37,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:09:37,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:37,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:37,189 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:37,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-16 14:09:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 14:09:37,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:37,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:37,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605566246] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:37,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:37,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-02-16 14:09:37,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110029403] [2022-02-16 14:09:37,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:37,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:09:37,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:09:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:09:37,722 INFO L87 Difference]: Start difference. First operand 63148 states and 173030 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-02-16 14:09:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:38,337 INFO L93 Difference]: Finished difference Result 65330 states and 177802 transitions. [2022-02-16 14:09:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:09:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 27 [2022-02-16 14:09:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:38,554 INFO L225 Difference]: With dead ends: 65330 [2022-02-16 14:09:38,554 INFO L226 Difference]: Without dead ends: 65330 [2022-02-16 14:09:38,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=1011, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:09:38,554 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 146 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:38,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 116 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:09:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65330 states. [2022-02-16 14:09:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65330 to 63151. [2022-02-16 14:09:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63151 states, 63150 states have (on average 2.740079176563737) internal successors, (173036), 63150 states have internal predecessors, (173036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63151 states to 63151 states and 173036 transitions. [2022-02-16 14:09:40,448 INFO L78 Accepts]: Start accepts. Automaton has 63151 states and 173036 transitions. Word has length 27 [2022-02-16 14:09:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:40,448 INFO L470 AbstractCegarLoop]: Abstraction has 63151 states and 173036 transitions. [2022-02-16 14:09:40,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-02-16 14:09:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 63151 states and 173036 transitions. [2022-02-16 14:09:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:40,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:40,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:40,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:40,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:40,771 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1510718712, now seen corresponding path program 74 times [2022-02-16 14:09:40,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:40,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248231379] [2022-02-16 14:09:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:40,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:40,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:40,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248231379] [2022-02-16 14:09:40,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248231379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:40,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38128949] [2022-02-16 14:09:40,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:09:40,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:40,897 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:40,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-16 14:09:40,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:09:40,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:09:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:41,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:41,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38128949] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:41,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:41,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-16 14:09:41,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92740458] [2022-02-16 14:09:41,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:41,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:09:41,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:09:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:09:41,892 INFO L87 Difference]: Start difference. First operand 63151 states and 173036 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:47,170 INFO L93 Difference]: Finished difference Result 67790 states and 184620 transitions. [2022-02-16 14:09:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-16 14:09:47,171 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:09:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:47,374 INFO L225 Difference]: With dead ends: 67790 [2022-02-16 14:09:47,374 INFO L226 Difference]: Without dead ends: 67751 [2022-02-16 14:09:47,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3077 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1610, Invalid=6946, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:09:47,375 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 467 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:47,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 133 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:09:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67751 states. [2022-02-16 14:09:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67751 to 63476. [2022-02-16 14:09:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63476 states, 63475 states have (on average 2.7398975974793225) internal successors, (173915), 63475 states have internal predecessors, (173915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63476 states to 63476 states and 173915 transitions. [2022-02-16 14:09:49,062 INFO L78 Accepts]: Start accepts. Automaton has 63476 states and 173915 transitions. Word has length 27 [2022-02-16 14:09:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:49,062 INFO L470 AbstractCegarLoop]: Abstraction has 63476 states and 173915 transitions. [2022-02-16 14:09:49,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 63476 states and 173915 transitions. [2022-02-16 14:09:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:49,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:49,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:49,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-16 14:09:49,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:49,371 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash 353422916, now seen corresponding path program 75 times [2022-02-16 14:09:49,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:49,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518568836] [2022-02-16 14:09:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:49,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:49,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:49,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518568836] [2022-02-16 14:09:49,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518568836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:49,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870928121] [2022-02-16 14:09:49,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:09:49,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:49,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:49,489 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:49,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-16 14:09:49,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:09:49,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:09:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:50,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:50,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870928121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:50,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:50,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-16 14:09:50,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447886114] [2022-02-16 14:09:50,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:50,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:09:50,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:09:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:09:50,730 INFO L87 Difference]: Start difference. First operand 63476 states and 173915 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:55,860 INFO L93 Difference]: Finished difference Result 67632 states and 183004 transitions. [2022-02-16 14:09:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-16 14:09:55,860 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:09:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:56,166 INFO L225 Difference]: With dead ends: 67632 [2022-02-16 14:09:56,166 INFO L226 Difference]: Without dead ends: 67598 [2022-02-16 14:09:56,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3287 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1588, Invalid=7342, Unknown=0, NotChecked=0, Total=8930 [2022-02-16 14:09:56,167 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 478 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:56,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 204 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:09:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67598 states. [2022-02-16 14:09:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67598 to 63439. [2022-02-16 14:09:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63439 states, 63438 states have (on average 2.7407547526719003) internal successors, (173868), 63438 states have internal predecessors, (173868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63439 states to 63439 states and 173868 transitions. [2022-02-16 14:09:57,747 INFO L78 Accepts]: Start accepts. Automaton has 63439 states and 173868 transitions. Word has length 27 [2022-02-16 14:09:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:57,747 INFO L470 AbstractCegarLoop]: Abstraction has 63439 states and 173868 transitions. [2022-02-16 14:09:57,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 63439 states and 173868 transitions. [2022-02-16 14:09:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:09:58,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:58,105 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:58,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:58,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-16 14:09:58,335 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash 792164992, now seen corresponding path program 76 times [2022-02-16 14:09:58,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:58,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297450321] [2022-02-16 14:09:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:58,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:58,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:58,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297450321] [2022-02-16 14:09:58,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297450321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:58,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057800832] [2022-02-16 14:09:58,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:09:58,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:58,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:58,452 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:09:58,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-16 14:09:58,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:09:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:09:58,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:58,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:59,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057800832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:59,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:59,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-16 14:09:59,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705734636] [2022-02-16 14:09:59,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:59,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:09:59,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:09:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:09:59,243 INFO L87 Difference]: Start difference. First operand 63439 states and 173868 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:04,711 INFO L93 Difference]: Finished difference Result 68074 states and 184572 transitions. [2022-02-16 14:10:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-16 14:10:04,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:10:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:04,938 INFO L225 Difference]: With dead ends: 68074 [2022-02-16 14:10:04,938 INFO L226 Difference]: Without dead ends: 68050 [2022-02-16 14:10:04,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3729 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1783, Invalid=8117, Unknown=0, NotChecked=0, Total=9900 [2022-02-16 14:10:04,939 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 522 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:04,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 172 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:10:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68050 states. [2022-02-16 14:10:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68050 to 63569. [2022-02-16 14:10:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63569 states, 63568 states have (on average 2.7412691920463126) internal successors, (174257), 63568 states have internal predecessors, (174257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63569 states to 63569 states and 174257 transitions. [2022-02-16 14:10:06,889 INFO L78 Accepts]: Start accepts. Automaton has 63569 states and 174257 transitions. Word has length 27 [2022-02-16 14:10:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:06,889 INFO L470 AbstractCegarLoop]: Abstraction has 63569 states and 174257 transitions. [2022-02-16 14:10:06,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63569 states and 174257 transitions. [2022-02-16 14:10:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:06,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:06,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:07,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:07,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-16 14:10:07,210 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1398796672, now seen corresponding path program 77 times [2022-02-16 14:10:07,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:07,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037063068] [2022-02-16 14:10:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:07,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:07,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:07,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037063068] [2022-02-16 14:10:07,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037063068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:07,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946937419] [2022-02-16 14:10:07,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:10:07,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:07,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:07,414 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:07,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-16 14:10:07,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:10:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:07,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:10:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:07,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:08,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946937419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:08,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:08,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-16 14:10:08,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191953419] [2022-02-16 14:10:08,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:08,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:10:08,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:10:08,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:10:08,482 INFO L87 Difference]: Start difference. First operand 63569 states and 174257 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:14,066 INFO L93 Difference]: Finished difference Result 79708 states and 218988 transitions. [2022-02-16 14:10:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-16 14:10:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:10:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:14,341 INFO L225 Difference]: With dead ends: 79708 [2022-02-16 14:10:14,341 INFO L226 Difference]: Without dead ends: 79615 [2022-02-16 14:10:14,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2178, Invalid=9164, Unknown=0, NotChecked=0, Total=11342 [2022-02-16 14:10:14,341 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 472 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:14,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 192 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:10:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79615 states. [2022-02-16 14:10:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79615 to 64357. [2022-02-16 14:10:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64357 states, 64356 states have (on average 2.7391851575610664) internal successors, (176283), 64356 states have internal predecessors, (176283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64357 states to 64357 states and 176283 transitions. [2022-02-16 14:10:16,396 INFO L78 Accepts]: Start accepts. Automaton has 64357 states and 176283 transitions. Word has length 27 [2022-02-16 14:10:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:16,397 INFO L470 AbstractCegarLoop]: Abstraction has 64357 states and 176283 transitions. [2022-02-16 14:10:16,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 64357 states and 176283 transitions. [2022-02-16 14:10:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:16,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:16,509 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:16,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-16 14:10:16,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-16 14:10:16,718 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1754117674, now seen corresponding path program 78 times [2022-02-16 14:10:16,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:16,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915603614] [2022-02-16 14:10:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:16,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:16,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:16,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915603614] [2022-02-16 14:10:16,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915603614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:16,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464929438] [2022-02-16 14:10:16,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:10:16,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:16,834 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:16,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-16 14:10:16,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:10:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 14:10:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:17,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:17,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464929438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:17,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:17,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-16 14:10:17,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031981300] [2022-02-16 14:10:17,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:17,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:10:17,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:10:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:10:17,427 INFO L87 Difference]: Start difference. First operand 64357 states and 176283 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2022-02-16 14:10:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:22,570 INFO L93 Difference]: Finished difference Result 76637 states and 211183 transitions. [2022-02-16 14:10:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-16 14:10:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 27 [2022-02-16 14:10:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:22,829 INFO L225 Difference]: With dead ends: 76637 [2022-02-16 14:10:22,830 INFO L226 Difference]: Without dead ends: 76598 [2022-02-16 14:10:22,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1339, Invalid=5971, Unknown=0, NotChecked=0, Total=7310 [2022-02-16 14:10:22,830 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 388 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:22,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 198 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:10:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76598 states. [2022-02-16 14:10:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76598 to 65058. [2022-02-16 14:10:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65058 states, 65057 states have (on average 2.735708686228999) internal successors, (177977), 65057 states have internal predecessors, (177977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65058 states to 65058 states and 177977 transitions. [2022-02-16 14:10:24,765 INFO L78 Accepts]: Start accepts. Automaton has 65058 states and 177977 transitions. Word has length 27 [2022-02-16 14:10:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:24,765 INFO L470 AbstractCegarLoop]: Abstraction has 65058 states and 177977 transitions. [2022-02-16 14:10:24,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2022-02-16 14:10:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 65058 states and 177977 transitions. [2022-02-16 14:10:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:25,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:25,158 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:25,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:25,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-16 14:10:25,374 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1547309708, now seen corresponding path program 79 times [2022-02-16 14:10:25,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:25,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900376123] [2022-02-16 14:10:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:25,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:25,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:25,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900376123] [2022-02-16 14:10:25,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900376123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:25,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912819704] [2022-02-16 14:10:25,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:10:25,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:25,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:25,502 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:25,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-16 14:10:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:10:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:25,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:25,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912819704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:25,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:25,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2022-02-16 14:10:25,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340714904] [2022-02-16 14:10:25,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:25,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:10:25,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:10:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:10:25,961 INFO L87 Difference]: Start difference. First operand 65058 states and 177977 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-02-16 14:10:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:29,088 INFO L93 Difference]: Finished difference Result 78027 states and 209853 transitions. [2022-02-16 14:10:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-16 14:10:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 [2022-02-16 14:10:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:29,352 INFO L225 Difference]: With dead ends: 78027 [2022-02-16 14:10:29,353 INFO L226 Difference]: Without dead ends: 78022 [2022-02-16 14:10:29,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1495, Invalid=6877, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:10:29,353 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 251 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:29,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 287 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:10:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78022 states. [2022-02-16 14:10:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78022 to 67767. [2022-02-16 14:10:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67767 states, 67766 states have (on average 2.736814921937255) internal successors, (185463), 67766 states have internal predecessors, (185463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67767 states to 67767 states and 185463 transitions. [2022-02-16 14:10:31,358 INFO L78 Accepts]: Start accepts. Automaton has 67767 states and 185463 transitions. Word has length 27 [2022-02-16 14:10:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:31,358 INFO L470 AbstractCegarLoop]: Abstraction has 67767 states and 185463 transitions. [2022-02-16 14:10:31,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-02-16 14:10:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 67767 states and 185463 transitions. [2022-02-16 14:10:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:31,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:31,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:31,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-16 14:10:31,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:31,695 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1394873588, now seen corresponding path program 80 times [2022-02-16 14:10:31,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:31,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737585827] [2022-02-16 14:10:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:31,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:31,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:31,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737585827] [2022-02-16 14:10:31,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737585827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:31,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409982679] [2022-02-16 14:10:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:10:31,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:31,781 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:31,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-16 14:10:32,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:10:32,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:10:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:32,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:32,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409982679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:32,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:32,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-16 14:10:32,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746748315] [2022-02-16 14:10:32,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:32,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:10:32,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:32,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:10:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:10:32,518 INFO L87 Difference]: Start difference. First operand 67767 states and 185463 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:34,718 INFO L93 Difference]: Finished difference Result 81209 states and 219603 transitions. [2022-02-16 14:10:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-16 14:10:34,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:10:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:34,996 INFO L225 Difference]: With dead ends: 81209 [2022-02-16 14:10:34,997 INFO L226 Difference]: Without dead ends: 81195 [2022-02-16 14:10:34,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1510, Invalid=6322, Unknown=0, NotChecked=0, Total=7832 [2022-02-16 14:10:34,997 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 356 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:34,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 209 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:10:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81195 states. [2022-02-16 14:10:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81195 to 67992. [2022-02-16 14:10:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67992 states, 67991 states have (on average 2.737259343148358) internal successors, (186109), 67991 states have internal predecessors, (186109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67992 states to 67992 states and 186109 transitions. [2022-02-16 14:10:37,145 INFO L78 Accepts]: Start accepts. Automaton has 67992 states and 186109 transitions. Word has length 27 [2022-02-16 14:10:37,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:37,145 INFO L470 AbstractCegarLoop]: Abstraction has 67992 states and 186109 transitions. [2022-02-16 14:10:37,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:37,145 INFO L276 IsEmpty]: Start isEmpty. Operand 67992 states and 186109 transitions. [2022-02-16 14:10:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:37,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:37,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:37,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:37,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:37,472 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1550427020, now seen corresponding path program 81 times [2022-02-16 14:10:37,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:37,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641410693] [2022-02-16 14:10:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:37,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:37,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:37,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641410693] [2022-02-16 14:10:37,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641410693] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:37,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759288067] [2022-02-16 14:10:37,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:10:37,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:37,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:37,543 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:37,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-16 14:10:37,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:10:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:10:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:38,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:38,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759288067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:38,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:38,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 22 [2022-02-16 14:10:38,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697276244] [2022-02-16 14:10:38,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:38,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:10:38,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:10:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:10:38,339 INFO L87 Difference]: Start difference. First operand 67992 states and 186109 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:41,445 INFO L93 Difference]: Finished difference Result 76343 states and 207826 transitions. [2022-02-16 14:10:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-16 14:10:41,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:10:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:41,703 INFO L225 Difference]: With dead ends: 76343 [2022-02-16 14:10:41,703 INFO L226 Difference]: Without dead ends: 76327 [2022-02-16 14:10:41,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1672, Invalid=7448, Unknown=0, NotChecked=0, Total=9120 [2022-02-16 14:10:41,704 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 298 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:41,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 175 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:10:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76327 states. [2022-02-16 14:10:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76327 to 67994. [2022-02-16 14:10:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67994 states, 67993 states have (on average 2.7373553159884105) internal successors, (186121), 67993 states have internal predecessors, (186121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67994 states to 67994 states and 186121 transitions. [2022-02-16 14:10:43,713 INFO L78 Accepts]: Start accepts. Automaton has 67994 states and 186121 transitions. Word has length 27 [2022-02-16 14:10:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:43,713 INFO L470 AbstractCegarLoop]: Abstraction has 67994 states and 186121 transitions. [2022-02-16 14:10:43,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 67994 states and 186121 transitions. [2022-02-16 14:10:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:43,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:43,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:43,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:44,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-16 14:10:44,043 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -842842696, now seen corresponding path program 82 times [2022-02-16 14:10:44,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:44,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891170585] [2022-02-16 14:10:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:44,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:44,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:44,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891170585] [2022-02-16 14:10:44,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891170585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:44,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460753375] [2022-02-16 14:10:44,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:10:44,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:44,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:44,118 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:44,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-16 14:10:44,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:10:44,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:44,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:10:44,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:44,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:44,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460753375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:44,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:44,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-16 14:10:44,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809688858] [2022-02-16 14:10:44,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:44,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:10:44,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:44,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:10:44,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:10:44,451 INFO L87 Difference]: Start difference. First operand 67994 states and 186121 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:49,171 INFO L93 Difference]: Finished difference Result 83641 states and 226402 transitions. [2022-02-16 14:10:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-16 14:10:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:10:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:49,462 INFO L225 Difference]: With dead ends: 83641 [2022-02-16 14:10:49,462 INFO L226 Difference]: Without dead ends: 83641 [2022-02-16 14:10:49,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7696 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3318, Invalid=16142, Unknown=0, NotChecked=0, Total=19460 [2022-02-16 14:10:49,464 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 545 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 294 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:10:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83641 states. [2022-02-16 14:10:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83641 to 68912. [2022-02-16 14:10:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68912 states, 68911 states have (on average 2.74350974445299) internal successors, (189058), 68911 states have internal predecessors, (189058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68912 states to 68912 states and 189058 transitions. [2022-02-16 14:10:51,664 INFO L78 Accepts]: Start accepts. Automaton has 68912 states and 189058 transitions. Word has length 27 [2022-02-16 14:10:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:51,664 INFO L470 AbstractCegarLoop]: Abstraction has 68912 states and 189058 transitions. [2022-02-16 14:10:51,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 68912 states and 189058 transitions. [2022-02-16 14:10:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:52,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:52,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:52,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:52,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:52,265 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1525852036, now seen corresponding path program 83 times [2022-02-16 14:10:52,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:52,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043835930] [2022-02-16 14:10:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:52,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:52,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:52,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043835930] [2022-02-16 14:10:52,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043835930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:52,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427294114] [2022-02-16 14:10:52,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:10:52,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:52,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:52,356 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:52,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-16 14:10:52,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:10:52,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:52,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:10:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:52,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:52,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427294114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:52,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:52,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-16 14:10:52,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361044625] [2022-02-16 14:10:52,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:52,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:10:52,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:10:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:10:52,872 INFO L87 Difference]: Start difference. First operand 68912 states and 189058 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:56,242 INFO L93 Difference]: Finished difference Result 77712 states and 210023 transitions. [2022-02-16 14:10:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-16 14:10:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:10:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:56,485 INFO L225 Difference]: With dead ends: 77712 [2022-02-16 14:10:56,485 INFO L226 Difference]: Without dead ends: 77705 [2022-02-16 14:10:56,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4050 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2138, Invalid=8992, Unknown=0, NotChecked=0, Total=11130 [2022-02-16 14:10:56,486 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 469 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:56,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 212 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:10:56,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77705 states. [2022-02-16 14:10:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77705 to 69404. [2022-02-16 14:10:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69404 states, 69403 states have (on average 2.743584571272135) internal successors, (190413), 69403 states have internal predecessors, (190413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69404 states to 69404 states and 190413 transitions. [2022-02-16 14:10:58,464 INFO L78 Accepts]: Start accepts. Automaton has 69404 states and 190413 transitions. Word has length 27 [2022-02-16 14:10:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:58,464 INFO L470 AbstractCegarLoop]: Abstraction has 69404 states and 190413 transitions. [2022-02-16 14:10:58,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 69404 states and 190413 transitions. [2022-02-16 14:10:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:10:58,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:58,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:58,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:58,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:58,799 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1964551104, now seen corresponding path program 84 times [2022-02-16 14:10:58,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:58,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008817324] [2022-02-16 14:10:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:58,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:58,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:58,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008817324] [2022-02-16 14:10:58,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008817324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:58,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663482226] [2022-02-16 14:10:58,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:10:58,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:58,881 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:10:59,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-16 14:10:59,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:10:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-16 14:10:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:59,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:59,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663482226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:59,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:59,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 23 [2022-02-16 14:10:59,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103991297] [2022-02-16 14:10:59,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:59,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:10:59,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:59,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:10:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:10:59,630 INFO L87 Difference]: Start difference. First operand 69404 states and 190413 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:03,457 INFO L93 Difference]: Finished difference Result 77164 states and 208840 transitions. [2022-02-16 14:11:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-16 14:11:03,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-16 14:11:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:03,729 INFO L225 Difference]: With dead ends: 77164 [2022-02-16 14:11:03,730 INFO L226 Difference]: Without dead ends: 77159 [2022-02-16 14:11:03,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2070, Invalid=9060, Unknown=0, NotChecked=0, Total=11130 [2022-02-16 14:11:03,730 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 483 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:03,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 169 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:11:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77159 states. [2022-02-16 14:11:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77159 to 69789. [2022-02-16 14:11:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69789 states, 69788 states have (on average 2.743336963374792) internal successors, (191452), 69788 states have internal predecessors, (191452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69789 states to 69789 states and 191452 transitions. [2022-02-16 14:11:05,751 INFO L78 Accepts]: Start accepts. Automaton has 69789 states and 191452 transitions. Word has length 27 [2022-02-16 14:11:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:05,751 INFO L470 AbstractCegarLoop]: Abstraction has 69789 states and 191452 transitions. [2022-02-16 14:11:05,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 69789 states and 191452 transitions. [2022-02-16 14:11:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:11:05,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:05,871 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:05,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-16 14:11:06,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:06,087 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1695109188, now seen corresponding path program 85 times [2022-02-16 14:11:06,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:06,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334148053] [2022-02-16 14:11:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:06,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:06,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:06,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334148053] [2022-02-16 14:11:06,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334148053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:06,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950268862] [2022-02-16 14:11:06,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:11:06,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:06,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:06,208 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:11:06,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-16 14:11:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 14:11:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:06,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:07,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950268862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:07,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:07,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-02-16 14:11:07,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762848756] [2022-02-16 14:11:07,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:07,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:11:07,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:07,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:11:07,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:11:07,217 INFO L87 Difference]: Start difference. First operand 69789 states and 191452 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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) [2022-02-16 14:11:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:10,656 INFO L93 Difference]: Finished difference Result 95027 states and 263868 transitions. [2022-02-16 14:11:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:11:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 27 [2022-02-16 14:11:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:11,007 INFO L225 Difference]: With dead ends: 95027 [2022-02-16 14:11:11,007 INFO L226 Difference]: Without dead ends: 94984 [2022-02-16 14:11:11,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:11:11,008 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 325 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:11,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 176 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 700 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-02-16 14:11:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94984 states. [2022-02-16 14:11:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94984 to 71889. [2022-02-16 14:11:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71889 states, 71888 states have (on average 2.750612063209437) internal successors, (197736), 71888 states have internal predecessors, (197736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71889 states to 71889 states and 197736 transitions. [2022-02-16 14:11:13,506 INFO L78 Accepts]: Start accepts. Automaton has 71889 states and 197736 transitions. Word has length 27 [2022-02-16 14:11:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:13,506 INFO L470 AbstractCegarLoop]: Abstraction has 71889 states and 197736 transitions. [2022-02-16 14:11:13,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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) [2022-02-16 14:11:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 71889 states and 197736 transitions. [2022-02-16 14:11:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:11:13,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:13,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:13,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-16 14:11:13,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:13,843 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1522637366, now seen corresponding path program 19 times [2022-02-16 14:11:13,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:13,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434824122] [2022-02-16 14:11:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:13,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:13,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:13,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434824122] [2022-02-16 14:11:13,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434824122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:13,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697806305] [2022-02-16 14:11:13,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:11:13,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:13,919 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:11:13,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-16 14:11:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:11:13,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:14,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:14,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697806305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:14,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:14,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-02-16 14:11:14,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804722144] [2022-02-16 14:11:14,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:14,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:11:14,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:14,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:11:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:11:14,143 INFO L87 Difference]: Start difference. First operand 71889 states and 197736 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:11:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:16,420 INFO L93 Difference]: Finished difference Result 218170 states and 599197 transitions. [2022-02-16 14:11:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:11:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 29 [2022-02-16 14:11:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:17,644 INFO L225 Difference]: With dead ends: 218170 [2022-02-16 14:11:17,644 INFO L226 Difference]: Without dead ends: 218170 [2022-02-16 14:11:17,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=826, Invalid=1930, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:11:17,644 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 316 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:17,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 77 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:11:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218170 states. [2022-02-16 14:11:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218170 to 118054. [2022-02-16 14:11:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118054 states, 118053 states have (on average 2.815947074619027) internal successors, (332431), 118053 states have internal predecessors, (332431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118054 states to 118054 states and 332431 transitions. [2022-02-16 14:11:22,914 INFO L78 Accepts]: Start accepts. Automaton has 118054 states and 332431 transitions. Word has length 29 [2022-02-16 14:11:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:22,914 INFO L470 AbstractCegarLoop]: Abstraction has 118054 states and 332431 transitions. [2022-02-16 14:11:22,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-16 14:11:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 118054 states and 332431 transitions. [2022-02-16 14:11:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:11:23,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:23,088 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:23,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-16 14:11:23,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-16 14:11:23,299 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:23,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1674290250, now seen corresponding path program 20 times [2022-02-16 14:11:23,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:23,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321053900] [2022-02-16 14:11:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:23,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:23,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:23,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321053900] [2022-02-16 14:11:23,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321053900] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:23,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127307850] [2022-02-16 14:11:23,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:11:23,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:23,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:23,358 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:11:23,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:11:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:11:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:11:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:23,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-16 14:11:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:23,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:23,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127307850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:23,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:23,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2022-02-16 14:11:23,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608160886] [2022-02-16 14:11:23,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 14:11:23,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:23,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 14:11:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-02-16 14:11:23,597 INFO L87 Difference]: Start difference. First operand 118054 states and 332431 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:24,731 INFO L93 Difference]: Finished difference Result 122108 states and 341316 transitions. [2022-02-16 14:11:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:11:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-16 14:11:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:25,278 INFO L225 Difference]: With dead ends: 122108 [2022-02-16 14:11:25,278 INFO L226 Difference]: Without dead ends: 122082 [2022-02-16 14:11:25,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=308, Invalid=622, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:11:25,278 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:25,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 43 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:11:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122082 states. [2022-02-16 14:11:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122082 to 118160. [2022-02-16 14:11:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118160 states, 118159 states have (on average 2.814918880491541) internal successors, (332608), 118159 states have internal predecessors, (332608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118160 states to 118160 states and 332608 transitions. [2022-02-16 14:11:28,799 INFO L78 Accepts]: Start accepts. Automaton has 118160 states and 332608 transitions. Word has length 29 [2022-02-16 14:11:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:28,799 INFO L470 AbstractCegarLoop]: Abstraction has 118160 states and 332608 transitions. [2022-02-16 14:11:28,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 118160 states and 332608 transitions. [2022-02-16 14:11:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:11:28,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:28,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:28,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-16 14:11:29,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-16 14:11:29,179 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:29,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1113871164, now seen corresponding path program 86 times [2022-02-16 14:11:29,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:29,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141751643] [2022-02-16 14:11:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:29,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:29,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:29,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141751643] [2022-02-16 14:11:29,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141751643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:29,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618309067] [2022-02-16 14:11:29,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:11:29,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:29,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:29,242 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:11:29,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-16 14:11:29,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:11:29,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:11:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:11:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:29,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:29,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618309067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:29,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:29,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-02-16 14:11:29,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215481811] [2022-02-16 14:11:29,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:29,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:11:29,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:11:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:11:29,818 INFO L87 Difference]: Start difference. First operand 118160 states and 332608 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:32,761 INFO L93 Difference]: Finished difference Result 348136 states and 995391 transitions. [2022-02-16 14:11:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 14:11:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-16 14:11:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:34,616 INFO L225 Difference]: With dead ends: 348136 [2022-02-16 14:11:34,616 INFO L226 Difference]: Without dead ends: 348136 [2022-02-16 14:11:34,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=697, Invalid=1853, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 14:11:34,617 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 247 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:34,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 93 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:11:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348136 states. [2022-02-16 14:11:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348136 to 182857. [2022-02-16 14:11:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182857 states, 182856 states have (on average 2.875678129238308) internal successors, (525835), 182856 states have internal predecessors, (525835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182857 states to 182857 states and 525835 transitions. [2022-02-16 14:11:43,625 INFO L78 Accepts]: Start accepts. Automaton has 182857 states and 525835 transitions. Word has length 29 [2022-02-16 14:11:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:43,625 INFO L470 AbstractCegarLoop]: Abstraction has 182857 states and 525835 transitions. [2022-02-16 14:11:43,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 182857 states and 525835 transitions. [2022-02-16 14:11:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:11:43,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:43,832 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:43,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-16 14:11:44,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:44,049 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash 713464030, now seen corresponding path program 87 times [2022-02-16 14:11:44,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:44,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886916867] [2022-02-16 14:11:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:44,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:44,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:44,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886916867] [2022-02-16 14:11:44,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886916867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:44,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979895941] [2022-02-16 14:11:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:11:44,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:44,111 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:11:44,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-16 14:11:44,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-16 14:11:44,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:11:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:11:44,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:44,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:44,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979895941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:44,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:44,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-02-16 14:11:44,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631459885] [2022-02-16 14:11:44,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:44,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:11:44,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:11:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:11:44,447 INFO L87 Difference]: Start difference. First operand 182857 states and 525835 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2022-02-16 14:11:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:47,752 INFO L93 Difference]: Finished difference Result 262285 states and 755917 transitions. [2022-02-16 14:11:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 14:11:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 29 [2022-02-16 14:11:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:48,938 INFO L225 Difference]: With dead ends: 262285 [2022-02-16 14:11:48,939 INFO L226 Difference]: Without dead ends: 262285 [2022-02-16 14:11:48,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1031, Invalid=3129, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 14:11:48,939 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 294 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:48,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 93 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:11:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262285 states. [2022-02-16 14:11:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262285 to 207930. [2022-02-16 14:11:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207930 states, 207929 states have (on average 2.8828109595102176) internal successors, (599420), 207929 states have internal predecessors, (599420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207930 states to 207930 states and 599420 transitions. [2022-02-16 14:11:56,938 INFO L78 Accepts]: Start accepts. Automaton has 207930 states and 599420 transitions. Word has length 29 [2022-02-16 14:11:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:56,938 INFO L470 AbstractCegarLoop]: Abstraction has 207930 states and 599420 transitions. [2022-02-16 14:11:56,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2022-02-16 14:11:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 207930 states and 599420 transitions. [2022-02-16 14:11:57,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:11:57,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:57,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:57,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-16 14:11:57,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-16 14:11:57,408 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:57,408 INFO L85 PathProgramCache]: Analyzing trace with hash 558471654, now seen corresponding path program 88 times [2022-02-16 14:11:57,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:57,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108365612] [2022-02-16 14:11:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:57,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:57,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:57,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108365612] [2022-02-16 14:11:57,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108365612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:57,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953781734] [2022-02-16 14:11:57,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:11:57,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:57,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:57,531 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:11:57,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-16 14:11:57,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:11:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:11:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:11:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:57,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:58,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953781734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:58,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:58,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-02-16 14:11:58,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287412323] [2022-02-16 14:11:58,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:58,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:11:58,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:11:58,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:11:58,508 INFO L87 Difference]: Start difference. First operand 207930 states and 599420 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:03,105 INFO L93 Difference]: Finished difference Result 246008 states and 710944 transitions. [2022-02-16 14:12:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 14:12:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-16 14:12:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:04,703 INFO L225 Difference]: With dead ends: 246008 [2022-02-16 14:12:04,704 INFO L226 Difference]: Without dead ends: 245988 [2022-02-16 14:12:04,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1263, Invalid=4589, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:12:04,704 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 383 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:04,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 186 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:12:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245988 states. [2022-02-16 14:12:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245988 to 209692. [2022-02-16 14:12:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209692 states, 209691 states have (on average 2.8806434229413758) internal successors, (604045), 209691 states have internal predecessors, (604045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209692 states to 209692 states and 604045 transitions. [2022-02-16 14:12:12,855 INFO L78 Accepts]: Start accepts. Automaton has 209692 states and 604045 transitions. Word has length 29 [2022-02-16 14:12:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:12,856 INFO L470 AbstractCegarLoop]: Abstraction has 209692 states and 604045 transitions. [2022-02-16 14:12:12,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 209692 states and 604045 transitions. [2022-02-16 14:12:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:12:13,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:13,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:13,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-16 14:12:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-16 14:12:13,352 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:12:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1872354014, now seen corresponding path program 89 times [2022-02-16 14:12:13,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:13,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064600331] [2022-02-16 14:12:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:13,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:13,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:13,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064600331] [2022-02-16 14:12:13,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064600331] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:13,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161902873] [2022-02-16 14:12:13,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:12:13,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:13,494 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:12:13,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:12:13,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:12:13,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-16 14:12:13,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:12:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:13,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:14,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161902873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:12:14,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:12:14,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-02-16 14:12:14,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074622264] [2022-02-16 14:12:14,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:12:14,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:12:14,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:12:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:12:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:12:14,256 INFO L87 Difference]: Start difference. First operand 209692 states and 604045 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2022-02-16 14:12:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:19,037 INFO L93 Difference]: Finished difference Result 239590 states and 678661 transitions. [2022-02-16 14:12:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-16 14:12:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 29 [2022-02-16 14:12:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:20,441 INFO L225 Difference]: With dead ends: 239590 [2022-02-16 14:12:20,442 INFO L226 Difference]: Without dead ends: 239580 [2022-02-16 14:12:20,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3362 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1765, Invalid=6977, Unknown=0, NotChecked=0, Total=8742 [2022-02-16 14:12:20,444 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 450 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:20,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 246 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:12:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239580 states. [2022-02-16 14:12:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239580 to 209694. [2022-02-16 14:12:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209694 states, 209693 states have (on average 2.881436194818139) internal successors, (604217), 209693 states have internal predecessors, (604217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209694 states to 209694 states and 604217 transitions. [2022-02-16 14:12:28,087 INFO L78 Accepts]: Start accepts. Automaton has 209694 states and 604217 transitions. Word has length 29 [2022-02-16 14:12:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:28,088 INFO L470 AbstractCegarLoop]: Abstraction has 209694 states and 604217 transitions. [2022-02-16 14:12:28,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2022-02-16 14:12:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 209694 states and 604217 transitions. [2022-02-16 14:12:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:12:28,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:28,716 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:28,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-16 14:12:28,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-16 14:12:28,921 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:12:28,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:28,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1433611938, now seen corresponding path program 90 times [2022-02-16 14:12:28,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:28,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035522270] [2022-02-16 14:12:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:28,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:29,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:29,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035522270] [2022-02-16 14:12:29,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035522270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:29,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186919477] [2022-02-16 14:12:29,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:12:29,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:29,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:29,042 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:12:29,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:12:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:12:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:12:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:29,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-16 14:12:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:29,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:29,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186919477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:12:29,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:12:29,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-02-16 14:12:29,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718115311] [2022-02-16 14:12:29,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:12:29,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:12:29,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:12:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:12:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:12:29,780 INFO L87 Difference]: Start difference. First operand 209694 states and 604217 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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) [2022-02-16 14:12:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:34,847 INFO L93 Difference]: Finished difference Result 228686 states and 654063 transitions. [2022-02-16 14:12:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-16 14:12:34,847 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 29 [2022-02-16 14:12:34,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:35,852 INFO L225 Difference]: With dead ends: 228686 [2022-02-16 14:12:35,853 INFO L226 Difference]: Without dead ends: 228676 [2022-02-16 14:12:35,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1590, Invalid=5892, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 14:12:35,853 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 431 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:35,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 166 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:12:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228676 states. [2022-02-16 14:12:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228676 to 209899. [2022-02-16 14:12:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209899 states, 209898 states have (on average 2.881223260821923) internal successors, (604763), 209898 states have internal predecessors, (604763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209899 states to 209899 states and 604763 transitions. [2022-02-16 14:12:43,754 INFO L78 Accepts]: Start accepts. Automaton has 209899 states and 604763 transitions. Word has length 29 [2022-02-16 14:12:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:43,754 INFO L470 AbstractCegarLoop]: Abstraction has 209899 states and 604763 transitions. [2022-02-16 14:12:43,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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) [2022-02-16 14:12:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 209899 states and 604763 transitions. [2022-02-16 14:12:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:12:44,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:44,364 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:44,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-16 14:12:44,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-16 14:12:44,579 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:12:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash -709271910, now seen corresponding path program 91 times [2022-02-16 14:12:44,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:44,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436525601] [2022-02-16 14:12:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:44,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:44,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:44,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436525601] [2022-02-16 14:12:44,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436525601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:44,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186300005] [2022-02-16 14:12:44,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:12:44,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:44,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:44,709 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:12:44,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-16 14:12:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:12:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:45,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:45,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186300005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:12:45,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:12:45,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-02-16 14:12:45,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437201876] [2022-02-16 14:12:45,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:12:45,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:12:45,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:12:45,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:12:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:12:45,476 INFO L87 Difference]: Start difference. First operand 209899 states and 604763 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:51,478 INFO L93 Difference]: Finished difference Result 242438 states and 692693 transitions. [2022-02-16 14:12:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-16 14:12:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-16 14:12:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:52,647 INFO L225 Difference]: With dead ends: 242438 [2022-02-16 14:12:52,647 INFO L226 Difference]: Without dead ends: 242409 [2022-02-16 14:12:52,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3874 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1972, Invalid=8128, Unknown=0, NotChecked=0, Total=10100 [2022-02-16 14:12:52,648 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 461 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:52,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 238 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:12:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242409 states. [2022-02-16 14:12:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242409 to 210343. [2022-02-16 14:12:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210343 states, 210342 states have (on average 2.8823392380028716) internal successors, (606277), 210342 states have internal predecessors, (606277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210343 states to 210343 states and 606277 transitions. [2022-02-16 14:13:00,120 INFO L78 Accepts]: Start accepts. Automaton has 210343 states and 606277 transitions. Word has length 29 [2022-02-16 14:13:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:13:00,120 INFO L470 AbstractCegarLoop]: Abstraction has 210343 states and 606277 transitions. [2022-02-16 14:13:00,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 210343 states and 606277 transitions. [2022-02-16 14:13:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:13:00,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:13:00,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:13:00,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-16 14:13:00,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:00,983 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:13:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:13:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1287187806, now seen corresponding path program 92 times [2022-02-16 14:13:00,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:13:00,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452464585] [2022-02-16 14:13:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:13:00,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:13:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:01,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:13:01,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452464585] [2022-02-16 14:13:01,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452464585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:13:01,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099473231] [2022-02-16 14:13:01,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:13:01,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:01,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:13:01,116 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:13:01,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-16 14:13:01,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:13:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:13:01,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:13:01,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:13:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:01,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:13:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:01,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099473231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:01,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:01,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-02-16 14:13:01,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646008403] [2022-02-16 14:13:01,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:01,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:13:01,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:13:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:13:01,756 INFO L87 Difference]: Start difference. First operand 210343 states and 606277 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:13:07,666 INFO L93 Difference]: Finished difference Result 248068 states and 713723 transitions. [2022-02-16 14:13:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-16 14:13:07,666 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-16 14:13:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:13:09,356 INFO L225 Difference]: With dead ends: 248068 [2022-02-16 14:13:09,356 INFO L226 Difference]: Without dead ends: 248027 [2022-02-16 14:13:09,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3340 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1820, Invalid=7492, Unknown=0, NotChecked=0, Total=9312 [2022-02-16 14:13:09,357 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 395 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:13:09,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 190 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:13:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248027 states. [2022-02-16 14:13:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248027 to 212832. [2022-02-16 14:13:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212832 states, 212831 states have (on average 2.8813612678604152) internal successors, (613243), 212831 states have internal predecessors, (613243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212832 states to 212832 states and 613243 transitions. [2022-02-16 14:13:17,781 INFO L78 Accepts]: Start accepts. Automaton has 212832 states and 613243 transitions. Word has length 29 [2022-02-16 14:13:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:13:17,781 INFO L470 AbstractCegarLoop]: Abstraction has 212832 states and 613243 transitions. [2022-02-16 14:13:17,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 212832 states and 613243 transitions. [2022-02-16 14:13:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:13:18,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:13:18,434 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:13:18,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-16 14:13:18,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:18,648 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:13:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:13:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 576953822, now seen corresponding path program 93 times [2022-02-16 14:13:18,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:13:18,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416088156] [2022-02-16 14:13:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:13:18,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:13:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:18,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:13:18,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416088156] [2022-02-16 14:13:18,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416088156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:13:18,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104286286] [2022-02-16 14:13:18,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:13:18,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:18,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:13:18,804 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:13:18,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-16 14:13:18,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:13:18,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:13:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:13:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:13:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:19,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:13:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:19,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104286286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:19,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:19,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-02-16 14:13:19,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762978494] [2022-02-16 14:13:19,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:19,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:13:19,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:13:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:13:19,549 INFO L87 Difference]: Start difference. First operand 212832 states and 613243 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2022-02-16 14:13:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:13:25,457 INFO L93 Difference]: Finished difference Result 238574 states and 676050 transitions. [2022-02-16 14:13:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-16 14:13:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 29 [2022-02-16 14:13:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:13:26,808 INFO L225 Difference]: With dead ends: 238574 [2022-02-16 14:13:26,808 INFO L226 Difference]: Without dead ends: 238532 [2022-02-16 14:13:26,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2176, Invalid=9596, Unknown=0, NotChecked=0, Total=11772 [2022-02-16 14:13:26,809 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 480 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:13:26,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 239 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:13:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238532 states. [2022-02-16 14:13:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238532 to 212711. [2022-02-16 14:13:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212711 states, 212710 states have (on average 2.8823421559870246) internal successors, (613103), 212710 states have internal predecessors, (613103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212711 states to 212711 states and 613103 transitions. [2022-02-16 14:13:34,254 INFO L78 Accepts]: Start accepts. Automaton has 212711 states and 613103 transitions. Word has length 29 [2022-02-16 14:13:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:13:34,254 INFO L470 AbstractCegarLoop]: Abstraction has 212711 states and 613103 transitions. [2022-02-16 14:13:34,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2022-02-16 14:13:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 212711 states and 613103 transitions. [2022-02-16 14:13:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:13:34,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:13:34,863 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:13:34,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-02-16 14:13:35,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-02-16 14:13:35,079 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:13:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:13:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1015695898, now seen corresponding path program 94 times [2022-02-16 14:13:35,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:13:35,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869670738] [2022-02-16 14:13:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:13:35,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:13:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:35,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:13:35,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869670738] [2022-02-16 14:13:35,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869670738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:13:35,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651544176] [2022-02-16 14:13:35,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:13:35,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:35,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:13:35,209 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:13:35,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-16 14:13:35,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:13:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:13:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:13:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:13:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:13:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:35,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651544176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:35,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:35,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-02-16 14:13:35,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127515002] [2022-02-16 14:13:35,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:35,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:13:35,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:13:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:13:35,919 INFO L87 Difference]: Start difference. First operand 212711 states and 613103 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 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) [2022-02-16 14:13:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:13:41,324 INFO L93 Difference]: Finished difference Result 239028 states and 682026 transitions. [2022-02-16 14:13:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-16 14:13:41,325 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 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 29 [2022-02-16 14:13:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:13:42,701 INFO L225 Difference]: With dead ends: 239028 [2022-02-16 14:13:42,701 INFO L226 Difference]: Without dead ends: 239001 [2022-02-16 14:13:42,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4539 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2235, Invalid=9321, Unknown=0, NotChecked=0, Total=11556 [2022-02-16 14:13:42,701 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 581 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:13:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 165 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:13:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239001 states. [2022-02-16 14:13:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239001 to 213077. [2022-02-16 14:13:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213077 states, 213076 states have (on average 2.8821875762638682) internal successors, (614125), 213076 states have internal predecessors, (614125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213077 states to 213077 states and 614125 transitions. [2022-02-16 14:13:50,346 INFO L78 Accepts]: Start accepts. Automaton has 213077 states and 614125 transitions. Word has length 29 [2022-02-16 14:13:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:13:50,346 INFO L470 AbstractCegarLoop]: Abstraction has 213077 states and 614125 transitions. [2022-02-16 14:13:50,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 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) [2022-02-16 14:13:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 213077 states and 614125 transitions. [2022-02-16 14:13:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:13:50,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:13:50,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:13:50,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-16 14:13:50,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:50,898 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:13:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:13:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1622327578, now seen corresponding path program 95 times [2022-02-16 14:13:50,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:13:50,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585157668] [2022-02-16 14:13:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:13:50,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:13:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:51,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:13:51,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585157668] [2022-02-16 14:13:51,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585157668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:13:51,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180684750] [2022-02-16 14:13:51,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:13:51,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:13:51,087 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:13:51,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-16 14:13:51,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:13:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:13:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:13:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:13:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:51,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:13:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:52,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180684750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:52,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:52,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-02-16 14:13:52,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146771322] [2022-02-16 14:13:52,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:52,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:13:52,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:13:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:13:52,040 INFO L87 Difference]: Start difference. First operand 213077 states and 614125 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 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) [2022-02-16 14:13:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:13:58,877 INFO L93 Difference]: Finished difference Result 264774 states and 759835 transitions. [2022-02-16 14:13:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-16 14:13:58,877 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 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 29 [2022-02-16 14:13:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:14:00,046 INFO L225 Difference]: With dead ends: 264774 [2022-02-16 14:14:00,046 INFO L226 Difference]: Without dead ends: 264721 [2022-02-16 14:14:00,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1570, Invalid=6262, Unknown=0, NotChecked=0, Total=7832 [2022-02-16 14:14:00,047 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 554 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:14:00,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 187 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:14:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264721 states. [2022-02-16 14:14:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264721 to 217377. [2022-02-16 14:14:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217377 states, 217376 states have (on average 2.8780776166642132) internal successors, (625625), 217376 states have internal predecessors, (625625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217377 states to 217377 states and 625625 transitions. [2022-02-16 14:14:08,432 INFO L78 Accepts]: Start accepts. Automaton has 217377 states and 625625 transitions. Word has length 29 [2022-02-16 14:14:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:14:08,432 INFO L470 AbstractCegarLoop]: Abstraction has 217377 states and 625625 transitions. [2022-02-16 14:14:08,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 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) [2022-02-16 14:14:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 217377 states and 625625 transitions. [2022-02-16 14:14:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:14:09,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:14:09,125 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:14:09,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-16 14:14:09,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:14:09,341 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:14:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:14:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1530586768, now seen corresponding path program 96 times [2022-02-16 14:14:09,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:14:09,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646868390] [2022-02-16 14:14:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:14:09,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:14:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:14:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:09,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:14:09,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646868390] [2022-02-16 14:14:09,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646868390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:14:09,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896942027] [2022-02-16 14:14:09,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:14:09,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:14:09,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:14:09,477 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:14:09,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-16 14:14:09,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-16 14:14:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:14:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:14:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:14:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:09,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:14:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:10,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896942027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:14:10,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:14:10,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-02-16 14:14:10,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717386077] [2022-02-16 14:14:10,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:14:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:14:10,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:14:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:14:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:14:10,232 INFO L87 Difference]: Start difference. First operand 217377 states and 625625 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-02-16 14:14:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:14:15,852 INFO L93 Difference]: Finished difference Result 244558 states and 703328 transitions. [2022-02-16 14:14:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-16 14:14:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 29 [2022-02-16 14:14:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:14:17,353 INFO L225 Difference]: With dead ends: 244558 [2022-02-16 14:14:17,353 INFO L226 Difference]: Without dead ends: 244533 [2022-02-16 14:14:17,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1177, Invalid=4523, Unknown=0, NotChecked=0, Total=5700 [2022-02-16 14:14:17,354 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 529 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:14:17,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 225 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:14:17,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244533 states. [2022-02-16 14:14:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244533 to 218645. [2022-02-16 14:14:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218645 states, 218644 states have (on average 2.8769323649402683) internal successors, (629024), 218644 states have internal predecessors, (629024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218645 states to 218645 states and 629024 transitions. [2022-02-16 14:14:25,533 INFO L78 Accepts]: Start accepts. Automaton has 218645 states and 629024 transitions. Word has length 29 [2022-02-16 14:14:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:14:25,533 INFO L470 AbstractCegarLoop]: Abstraction has 218645 states and 629024 transitions. [2022-02-16 14:14:25,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-02-16 14:14:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 218645 states and 629024 transitions. [2022-02-16 14:14:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:14:26,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:14:26,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:14:26,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-16 14:14:26,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-16 14:14:26,398 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:14:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:14:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1323778802, now seen corresponding path program 97 times [2022-02-16 14:14:26,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:14:26,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439806418] [2022-02-16 14:14:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:14:26,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:14:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:14:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:26,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:14:26,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439806418] [2022-02-16 14:14:26,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439806418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:14:26,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689141112] [2022-02-16 14:14:26,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:14:26,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:14:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:14:26,500 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:14:26,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-16 14:14:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:14:26,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:14:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:14:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:26,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:14:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:26,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689141112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:14:26,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:14:26,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 24 [2022-02-16 14:14:26,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790799932] [2022-02-16 14:14:26,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:14:26,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:14:26,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:14:26,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:14:26,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:14:26,980 INFO L87 Difference]: Start difference. First operand 218645 states and 629024 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:14:35,198 INFO L93 Difference]: Finished difference Result 660804 states and 1881201 transitions. [2022-02-16 14:14:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-16 14:14:35,198 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-16 14:14:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:14:39,352 INFO L225 Difference]: With dead ends: 660804 [2022-02-16 14:14:39,352 INFO L226 Difference]: Without dead ends: 660804 [2022-02-16 14:14:39,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2109, Invalid=7397, Unknown=0, NotChecked=0, Total=9506 [2022-02-16 14:14:39,353 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 389 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:14:39,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 166 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:14:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660804 states. [2022-02-16 14:14:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660804 to 441830. [2022-02-16 14:15:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441830 states, 441829 states have (on average 2.8879113865318935) internal successors, (1275963), 441829 states have internal predecessors, (1275963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441830 states to 441830 states and 1275963 transitions. [2022-02-16 14:15:04,735 INFO L78 Accepts]: Start accepts. Automaton has 441830 states and 1275963 transitions. Word has length 29 [2022-02-16 14:15:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:15:04,735 INFO L470 AbstractCegarLoop]: Abstraction has 441830 states and 1275963 transitions. [2022-02-16 14:15:04,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 441830 states and 1275963 transitions. [2022-02-16 14:15:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-16 14:15:05,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:15:05,732 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:15:05,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-16 14:15:05,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-16 14:15:05,947 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:15:05,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:15:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash 764390806, now seen corresponding path program 98 times [2022-02-16 14:15:05,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:15:05,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453808269] [2022-02-16 14:15:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:15:05,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:15:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:15:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:15:06,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:15:06,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453808269] [2022-02-16 14:15:06,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453808269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:15:06,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444051916] [2022-02-16 14:15:06,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:15:06,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:15:06,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:15:06,062 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:15:06,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-16 14:15:06,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:15:06,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:15:06,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-16 14:15:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:15:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:15:06,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:15:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:15:06,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444051916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:15:06,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:15:06,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-02-16 14:15:06,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028058476] [2022-02-16 14:15:06,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:15:06,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 14:15:06,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:15:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 14:15:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-02-16 14:15:06,530 INFO L87 Difference]: Start difference. First operand 441830 states and 1275963 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)