/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:44:07,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:44:07,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:44:07,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:44:07,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:44:07,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:44:07,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:44:07,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:44:07,719 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:44:07,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:44:07,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:44:07,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:44:07,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:44:07,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:44:07,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:44:07,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:44:07,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:44:07,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:44:07,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:44:07,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:44:07,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:44:07,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:44:07,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:44:07,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:44:07,723 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:44:07,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:44:07,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:44:07,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:44:07,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:44:07,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:44:07,940 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:44:07,943 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:44:07,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2022-03-03 19:44:07,945 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2022-03-03 19:44:07,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:44:07,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:44:07,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:44:07,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:44:07,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:44:07,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:07,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:07,988 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:44:07,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:44:07,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:44:07,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:44:07,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:44:07,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:07,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:07,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:07,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:07,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:08,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:08,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:08,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:44:08,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:44:08,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:44:08,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:44:08,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/1) ... [2022-03-03 19:44:08,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:44:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:08,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:44:08,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:44:08,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:44:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:44:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:44:08,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:44:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:44:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:44:08,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:44:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:44:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:44:08,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:44:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:44:08,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:44:08,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-03 19:44:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-03 19:44:08,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-03 19:44:08,075 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:44:08,108 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:44:08,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:44:08,212 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:44:08,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:44:08,225 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:44:08,226 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:44:08 BoogieIcfgContainer [2022-03-03 19:44:08,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:44:08,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:44:08,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:44:08,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:44:08,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:44:07" (1/2) ... [2022-03-03 19:44:08,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb8a268 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:44:08, skipping insertion in model container [2022-03-03 19:44:08,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:44:08" (2/2) ... [2022-03-03 19:44:08,247 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2022-03-03 19:44:08,254 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:44:08,254 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:44:08,254 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:44:08,254 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:44:08,317 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-03 19:44:08,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:44:08,369 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:44:08,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-03 19:44:08,398 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-03-03 19:44:08,477 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:44:08,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:08,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:08,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash -315677691, now seen corresponding path program 1 times [2022-03-03 19:44:08,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:08,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015583001] [2022-03-03 19:44:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:08,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:08,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015583001] [2022-03-03 19:44:08,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015583001] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:44:08,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:44:08,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:44:08,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322942023] [2022-03-03 19:44:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:44:08,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:44:08,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:44:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:44:08,686 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:08,770 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2022-03-03 19:44:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:44:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:44:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:08,786 INFO L225 Difference]: With dead ends: 691 [2022-03-03 19:44:08,787 INFO L226 Difference]: Without dead ends: 691 [2022-03-03 19:44:08,788 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 [2022-03-03 19:44:08,790 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:08,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:44:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-03 19:44:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2022-03-03 19:44:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 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) [2022-03-03 19:44:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2022-03-03 19:44:08,900 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2022-03-03 19:44:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:08,901 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2022-03-03 19:44:08,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2022-03-03 19:44:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:44:08,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:08,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:08,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:44:08,909 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:08,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1754302367, now seen corresponding path program 1 times [2022-03-03 19:44:08,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:08,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058318566] [2022-03-03 19:44:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:08,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:08,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:08,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058318566] [2022-03-03 19:44:08,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058318566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:08,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831928989] [2022-03-03 19:44:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:08,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:08,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:08,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:08,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:44:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:44:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:09,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:44:09,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831928989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:44:09,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:44:09,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-03-03 19:44:09,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821046509] [2022-03-03 19:44:09,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:44:09,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:44:09,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:44:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:44:09,114 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:09,175 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2022-03-03 19:44:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:44:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:44:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:09,186 INFO L225 Difference]: With dead ends: 1250 [2022-03-03 19:44:09,186 INFO L226 Difference]: Without dead ends: 1250 [2022-03-03 19:44:09,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:44:09,191 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:09,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:44:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-03-03 19:44:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2022-03-03 19:44:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2022-03-03 19:44:09,242 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2022-03-03 19:44:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:09,244 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2022-03-03 19:44:09,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2022-03-03 19:44:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:44:09,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:09,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:09,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:09,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:09,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash 971971041, now seen corresponding path program 1 times [2022-03-03 19:44:09,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:09,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234550376] [2022-03-03 19:44:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:09,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:09,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:09,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234550376] [2022-03-03 19:44:09,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234550376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:09,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218979087] [2022-03-03 19:44:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:09,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:09,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:44:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:09,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:44:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:09,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:44:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:09,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:09,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:09,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:44:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:09,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218979087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:09,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:09,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-03-03 19:44:09,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854581242] [2022-03-03 19:44:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:09,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:44:09,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:44:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:44:09,861 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:09,946 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2022-03-03 19:44:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:44:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:44:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:09,956 INFO L225 Difference]: With dead ends: 1934 [2022-03-03 19:44:09,956 INFO L226 Difference]: Without dead ends: 1807 [2022-03-03 19:44:09,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:44:09,959 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:09,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 127 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:44:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-03-03 19:44:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2022-03-03 19:44:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2022-03-03 19:44:09,997 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2022-03-03 19:44:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:09,998 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2022-03-03 19:44:09,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2022-03-03 19:44:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:44:10,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:10,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:10,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:10,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-03 19:44:10,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash 770843555, now seen corresponding path program 2 times [2022-03-03 19:44:10,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:10,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949215681] [2022-03-03 19:44:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:10,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:10,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949215681] [2022-03-03 19:44:10,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949215681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:10,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468815030] [2022-03-03 19:44:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:10,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:10,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:10,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:44:10,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:10,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:44:10,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:10,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:10,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468815030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:10,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:10,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-03 19:44:10,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128140400] [2022-03-03 19:44:10,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:10,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:44:10,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:44:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:44:10,399 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:10,505 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2022-03-03 19:44:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:44:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 26 [2022-03-03 19:44:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:10,518 INFO L225 Difference]: With dead ends: 2404 [2022-03-03 19:44:10,518 INFO L226 Difference]: Without dead ends: 2234 [2022-03-03 19:44:10,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:44:10,523 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:10,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:44:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-03-03 19:44:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2022-03-03 19:44:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2022-03-03 19:44:10,585 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2022-03-03 19:44:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:10,586 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2022-03-03 19:44:10,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2022-03-03 19:44:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:44:10,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:10,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:10,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:10,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:10,809 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1128294111, now seen corresponding path program 1 times [2022-03-03 19:44:10,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:10,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122117385] [2022-03-03 19:44:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:10,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:10,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:10,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122117385] [2022-03-03 19:44:10,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122117385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:44:10,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:44:10,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:44:10,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371611822] [2022-03-03 19:44:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:44:10,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:44:10,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:44:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:44:10,848 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:10,894 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2022-03-03 19:44:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:44:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:44:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:10,913 INFO L225 Difference]: With dead ends: 3426 [2022-03-03 19:44:10,914 INFO L226 Difference]: Without dead ends: 3255 [2022-03-03 19:44:10,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:44:10,914 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:10,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:44:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-03-03 19:44:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2022-03-03 19:44:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2022-03-03 19:44:10,988 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2022-03-03 19:44:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:10,989 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2022-03-03 19:44:10,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2022-03-03 19:44:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:44:10,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:10,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:10,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:44:10,996 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash -448766263, now seen corresponding path program 3 times [2022-03-03 19:44:10,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:10,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114217844] [2022-03-03 19:44:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:11,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:11,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114217844] [2022-03-03 19:44:11,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114217844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:11,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108272284] [2022-03-03 19:44:11,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:11,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:11,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:11,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:44:11,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:44:11,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:11,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:44:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:11,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:11,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2022-03-03 19:44:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:11,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:11,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:11,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:11,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:11,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:11,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2022-03-03 19:44:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:11,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108272284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:11,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:11,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-03-03 19:44:11,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733546922] [2022-03-03 19:44:11,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:44:11,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:44:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:44:11,794 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:12,181 INFO L93 Difference]: Finished difference Result 7428 states and 28812 transitions. [2022-03-03 19:44:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:44:12,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:44:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:12,221 INFO L225 Difference]: With dead ends: 7428 [2022-03-03 19:44:12,221 INFO L226 Difference]: Without dead ends: 7208 [2022-03-03 19:44:12,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:44:12,222 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 410 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:12,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 711 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 312 Invalid, 0 Unknown, 199 Unchecked, 0.2s Time] [2022-03-03 19:44:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2022-03-03 19:44:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 4181. [2022-03-03 19:44:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 4180 states have (on average 3.95933014354067) internal successors, (16550), 4180 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 16550 transitions. [2022-03-03 19:44:12,399 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 16550 transitions. Word has length 29 [2022-03-03 19:44:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:12,400 INFO L470 AbstractCegarLoop]: Abstraction has 4181 states and 16550 transitions. [2022-03-03 19:44:12,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 16550 transitions. [2022-03-03 19:44:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:44:12,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:12,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:12,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:12,627 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 [2022-03-03 19:44:12,627 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1095707459, now seen corresponding path program 4 times [2022-03-03 19:44:12,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:12,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553819744] [2022-03-03 19:44:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:12,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:12,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553819744] [2022-03-03 19:44:12,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553819744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:12,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711842164] [2022-03-03 19:44:12,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:44:12,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:12,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:12,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:12,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:44:12,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:44:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:44:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:12,893 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:12,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-03-03 19:44:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:12,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:13,043 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:13,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 50 [2022-03-03 19:44:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:13,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711842164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:13,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:13,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-03 19:44:13,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898437292] [2022-03-03 19:44:13,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:13,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:44:13,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:44:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:44:13,163 INFO L87 Difference]: Start difference. First operand 4181 states and 16550 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:13,603 INFO L93 Difference]: Finished difference Result 10023 states and 38688 transitions. [2022-03-03 19:44:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:44:13,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 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 [2022-03-03 19:44:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:13,634 INFO L225 Difference]: With dead ends: 10023 [2022-03-03 19:44:13,635 INFO L226 Difference]: Without dead ends: 9344 [2022-03-03 19:44:13,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:44:13,635 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 309 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:13,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 490 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:44:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2022-03-03 19:44:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 4644. [2022-03-03 19:44:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 4.0200301529183715) internal successors, (18665), 4643 states have internal predecessors, (18665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 18665 transitions. [2022-03-03 19:44:13,819 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 18665 transitions. Word has length 29 [2022-03-03 19:44:13,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:13,819 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 18665 transitions. [2022-03-03 19:44:13,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 18665 transitions. [2022-03-03 19:44:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:44:13,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:13,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:13,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:14,047 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 [2022-03-03 19:44:14,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash 687515522, now seen corresponding path program 1 times [2022-03-03 19:44:14,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:14,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187633564] [2022-03-03 19:44:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:14,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:14,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187633564] [2022-03-03 19:44:14,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187633564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:14,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012423742] [2022-03-03 19:44:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:14,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:14,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:14,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:14,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:44:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:44:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:14,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:14,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012423742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:14,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:14,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-03-03 19:44:14,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186840900] [2022-03-03 19:44:14,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:14,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:44:14,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:44:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:44:14,265 INFO L87 Difference]: Start difference. First operand 4644 states and 18665 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:14,586 INFO L93 Difference]: Finished difference Result 13743 states and 52353 transitions. [2022-03-03 19:44:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:44:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-03-03 19:44:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:14,631 INFO L225 Difference]: With dead ends: 13743 [2022-03-03 19:44:14,631 INFO L226 Difference]: Without dead ends: 13597 [2022-03-03 19:44:14,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:44:14,632 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 302 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:14,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 73 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:44:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13597 states. [2022-03-03 19:44:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13597 to 5860. [2022-03-03 19:44:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5860 states, 5859 states have (on average 4.183478409284861) internal successors, (24511), 5859 states have internal predecessors, (24511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5860 states to 5860 states and 24511 transitions. [2022-03-03 19:44:14,840 INFO L78 Accepts]: Start accepts. Automaton has 5860 states and 24511 transitions. Word has length 29 [2022-03-03 19:44:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:14,840 INFO L470 AbstractCegarLoop]: Abstraction has 5860 states and 24511 transitions. [2022-03-03 19:44:14,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5860 states and 24511 transitions. [2022-03-03 19:44:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:44:14,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:14,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:14,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:15,075 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 [2022-03-03 19:44:15,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash -774339582, now seen corresponding path program 2 times [2022-03-03 19:44:15,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:15,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484538487] [2022-03-03 19:44:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:15,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:15,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:15,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484538487] [2022-03-03 19:44:15,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484538487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:15,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923285365] [2022-03-03 19:44:15,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:15,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:15,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:15,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:15,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:44:15,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:15,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:44:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:15,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:15,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923285365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:15,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:15,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-03-03 19:44:15,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741067780] [2022-03-03 19:44:15,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:15,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:44:15,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:44:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:44:15,291 INFO L87 Difference]: Start difference. First operand 5860 states and 24511 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:15,772 INFO L93 Difference]: Finished difference Result 15540 states and 58906 transitions. [2022-03-03 19:44:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:44:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-03-03 19:44:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:15,828 INFO L225 Difference]: With dead ends: 15540 [2022-03-03 19:44:15,828 INFO L226 Difference]: Without dead ends: 15540 [2022-03-03 19:44:15,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:44:15,829 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 236 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:15,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 115 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:44:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15540 states. [2022-03-03 19:44:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15540 to 6129. [2022-03-03 19:44:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6129 states, 6128 states have (on average 4.1308746736292425) internal successors, (25314), 6128 states have internal predecessors, (25314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6129 states to 6129 states and 25314 transitions. [2022-03-03 19:44:16,115 INFO L78 Accepts]: Start accepts. Automaton has 6129 states and 25314 transitions. Word has length 29 [2022-03-03 19:44:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:16,116 INFO L470 AbstractCegarLoop]: Abstraction has 6129 states and 25314 transitions. [2022-03-03 19:44:16,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6129 states and 25314 transitions. [2022-03-03 19:44:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:44:16,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:16,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:16,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:16,354 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 [2022-03-03 19:44:16,354 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1984386215, now seen corresponding path program 5 times [2022-03-03 19:44:16,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:16,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210275462] [2022-03-03 19:44:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:16,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:16,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210275462] [2022-03-03 19:44:16,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210275462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:16,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723905059] [2022-03-03 19:44:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:16,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:16,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:16,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:44:16,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:44:16,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:16,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:44:16,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:16,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:16,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723905059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:16,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:16,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-03-03 19:44:16,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344204489] [2022-03-03 19:44:16,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:16,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:44:16,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:44:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:44:16,572 INFO L87 Difference]: Start difference. First operand 6129 states and 25314 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:16,723 INFO L93 Difference]: Finished difference Result 10040 states and 40689 transitions. [2022-03-03 19:44:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:44:16,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:44:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:16,750 INFO L225 Difference]: With dead ends: 10040 [2022-03-03 19:44:16,750 INFO L226 Difference]: Without dead ends: 9593 [2022-03-03 19:44:16,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:44:16,751 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 97 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:16,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 170 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:44:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9593 states. [2022-03-03 19:44:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9593 to 8110. [2022-03-03 19:44:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8110 states, 8109 states have (on average 4.169811320754717) internal successors, (33813), 8109 states have internal predecessors, (33813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8110 states to 8110 states and 33813 transitions. [2022-03-03 19:44:17,027 INFO L78 Accepts]: Start accepts. Automaton has 8110 states and 33813 transitions. Word has length 31 [2022-03-03 19:44:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:17,027 INFO L470 AbstractCegarLoop]: Abstraction has 8110 states and 33813 transitions. [2022-03-03 19:44:17,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8110 states and 33813 transitions. [2022-03-03 19:44:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:17,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:17,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:17,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:17,263 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 [2022-03-03 19:44:17,264 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1580215652, now seen corresponding path program 3 times [2022-03-03 19:44:17,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:17,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300600923] [2022-03-03 19:44:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:17,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:44:17,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:17,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300600923] [2022-03-03 19:44:17,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300600923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:17,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296721217] [2022-03-03 19:44:17,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:17,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:17,294 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:17,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:44:17,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:44:17,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:44:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:44:17,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:44:17,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296721217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:17,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:17,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-03-03 19:44:17,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293266246] [2022-03-03 19:44:17,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:17,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:44:17,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:17,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:44:17,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:44:17,421 INFO L87 Difference]: Start difference. First operand 8110 states and 33813 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:17,521 INFO L93 Difference]: Finished difference Result 9727 states and 39843 transitions. [2022-03-03 19:44:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:44:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:44:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:17,548 INFO L225 Difference]: With dead ends: 9727 [2022-03-03 19:44:17,548 INFO L226 Difference]: Without dead ends: 9727 [2022-03-03 19:44:17,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:44:17,550 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 107 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:17,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 94 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:44:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2022-03-03 19:44:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 6714. [2022-03-03 19:44:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6714 states, 6713 states have (on average 4.045136302696261) internal successors, (27155), 6713 states have internal predecessors, (27155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 27155 transitions. [2022-03-03 19:44:17,803 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 27155 transitions. Word has length 32 [2022-03-03 19:44:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 6714 states and 27155 transitions. [2022-03-03 19:44:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 27155 transitions. [2022-03-03 19:44:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:17,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:17,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:17,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:18,035 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 [2022-03-03 19:44:18,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash -499344603, now seen corresponding path program 6 times [2022-03-03 19:44:18,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:18,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989642500] [2022-03-03 19:44:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:18,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:18,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989642500] [2022-03-03 19:44:18,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989642500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:18,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225123649] [2022-03-03 19:44:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:44:18,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:18,131 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:18,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:44:18,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:44:18,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:18,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:44:18,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:18,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:18,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:18,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 86 [2022-03-03 19:44:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:18,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:19,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:19,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:19,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:19,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 64 [2022-03-03 19:44:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:19,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225123649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:19,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:19,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-03-03 19:44:19,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17808015] [2022-03-03 19:44:19,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:19,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:44:19,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:19,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:44:19,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:44:19,290 INFO L87 Difference]: Start difference. First operand 6714 states and 27155 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:20,832 INFO L93 Difference]: Finished difference Result 36757 states and 149035 transitions. [2022-03-03 19:44:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:44:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:20,966 INFO L225 Difference]: With dead ends: 36757 [2022-03-03 19:44:20,966 INFO L226 Difference]: Without dead ends: 35423 [2022-03-03 19:44:20,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:44:20,967 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 832 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 839 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:20,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 2655 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 842 Invalid, 0 Unknown, 839 Unchecked, 0.4s Time] [2022-03-03 19:44:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35423 states. [2022-03-03 19:44:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35423 to 11467. [2022-03-03 19:44:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11467 states, 11466 states have (on average 4.172335600907029) internal successors, (47840), 11466 states have internal predecessors, (47840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11467 states to 11467 states and 47840 transitions. [2022-03-03 19:44:21,529 INFO L78 Accepts]: Start accepts. Automaton has 11467 states and 47840 transitions. Word has length 34 [2022-03-03 19:44:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:21,529 INFO L470 AbstractCegarLoop]: Abstraction has 11467 states and 47840 transitions. [2022-03-03 19:44:21,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11467 states and 47840 transitions. [2022-03-03 19:44:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:21,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:21,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:21,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-03 19:44:21,753 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,SelfDestructingSolverStorable11 [2022-03-03 19:44:21,754 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:21,754 INFO L85 PathProgramCache]: Analyzing trace with hash 243147073, now seen corresponding path program 7 times [2022-03-03 19:44:21,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:21,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726025004] [2022-03-03 19:44:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:21,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:21,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726025004] [2022-03-03 19:44:21,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726025004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:21,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020893712] [2022-03-03 19:44:21,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:44:21,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:21,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:21,869 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:21,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:44:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:44:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:22,165 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:44:22,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2022-03-03 19:44:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:22,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:22,394 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:44:22,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-03-03 19:44:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:22,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020893712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:22,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:22,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-03-03 19:44:22,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410573254] [2022-03-03 19:44:22,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:22,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:44:22,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:44:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:44:22,896 INFO L87 Difference]: Start difference. First operand 11467 states and 47840 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:23,584 INFO L93 Difference]: Finished difference Result 20486 states and 84293 transitions. [2022-03-03 19:44:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:44:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:23,644 INFO L225 Difference]: With dead ends: 20486 [2022-03-03 19:44:23,645 INFO L226 Difference]: Without dead ends: 19897 [2022-03-03 19:44:23,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:44:23,645 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 434 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:23,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1100 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:44:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19897 states. [2022-03-03 19:44:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19897 to 11497. [2022-03-03 19:44:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11497 states, 11496 states have (on average 4.177887961029923) internal successors, (48029), 11496 states have internal predecessors, (48029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11497 states to 11497 states and 48029 transitions. [2022-03-03 19:44:24,059 INFO L78 Accepts]: Start accepts. Automaton has 11497 states and 48029 transitions. Word has length 34 [2022-03-03 19:44:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:24,060 INFO L470 AbstractCegarLoop]: Abstraction has 11497 states and 48029 transitions. [2022-03-03 19:44:24,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 11497 states and 48029 transitions. [2022-03-03 19:44:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:24,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:24,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:24,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-03 19:44:24,286 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,SelfDestructingSolverStorable12 [2022-03-03 19:44:24,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1343218526, now seen corresponding path program 4 times [2022-03-03 19:44:24,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:24,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784136016] [2022-03-03 19:44:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:24,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:24,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784136016] [2022-03-03 19:44:24,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784136016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:24,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41094813] [2022-03-03 19:44:24,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:44:24,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:24,398 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:24,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:44:24,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:44:24,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:44:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:24,681 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:24,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-03-03 19:44:24,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:44:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:24,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:24,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:24,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:44:24,921 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:24,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:44:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:25,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41094813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:25,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:25,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:44:25,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011361403] [2022-03-03 19:44:25,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:25,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:44:25,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:25,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:44:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:44:25,075 INFO L87 Difference]: Start difference. First operand 11497 states and 48029 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:25,878 INFO L93 Difference]: Finished difference Result 32855 states and 134578 transitions. [2022-03-03 19:44:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:44:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:26,008 INFO L225 Difference]: With dead ends: 32855 [2022-03-03 19:44:26,008 INFO L226 Difference]: Without dead ends: 32736 [2022-03-03 19:44:26,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:44:26,009 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 212 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:26,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 908 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:44:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32736 states. [2022-03-03 19:44:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32736 to 14119. [2022-03-03 19:44:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14119 states, 14118 states have (on average 4.217382065448364) internal successors, (59541), 14118 states have internal predecessors, (59541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14119 states to 14119 states and 59541 transitions. [2022-03-03 19:44:26,591 INFO L78 Accepts]: Start accepts. Automaton has 14119 states and 59541 transitions. Word has length 34 [2022-03-03 19:44:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:26,591 INFO L470 AbstractCegarLoop]: Abstraction has 14119 states and 59541 transitions. [2022-03-03 19:44:26,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14119 states and 59541 transitions. [2022-03-03 19:44:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:26,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:26,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:26,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-03 19:44:26,845 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,SelfDestructingSolverStorable13 [2022-03-03 19:44:26,846 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:26,846 INFO L85 PathProgramCache]: Analyzing trace with hash -534537824, now seen corresponding path program 5 times [2022-03-03 19:44:26,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:26,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099293899] [2022-03-03 19:44:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:26,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:26,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:26,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099293899] [2022-03-03 19:44:26,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099293899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:26,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143448819] [2022-03-03 19:44:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:26,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:26,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:26,955 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:26,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:44:26,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:44:26,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:26,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:44:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:27,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-03 19:44:27,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:27,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:44:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:27,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:27,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:27,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:44:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:28,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:28,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-03-03 19:44:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:28,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143448819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:28,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:28,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:44:28,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695995777] [2022-03-03 19:44:28,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:28,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:44:28,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:44:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:44:28,180 INFO L87 Difference]: Start difference. First operand 14119 states and 59541 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:29,274 INFO L93 Difference]: Finished difference Result 39559 states and 160566 transitions. [2022-03-03 19:44:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:44:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:29,557 INFO L225 Difference]: With dead ends: 39559 [2022-03-03 19:44:29,557 INFO L226 Difference]: Without dead ends: 39129 [2022-03-03 19:44:29,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:44:29,558 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 700 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 946 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:29,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1271 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 832 Invalid, 0 Unknown, 946 Unchecked, 0.4s Time] [2022-03-03 19:44:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39129 states. [2022-03-03 19:44:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39129 to 15117. [2022-03-03 19:44:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15117 states, 15116 states have (on average 4.243053717914792) internal successors, (64138), 15116 states have internal predecessors, (64138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15117 states to 15117 states and 64138 transitions. [2022-03-03 19:44:30,174 INFO L78 Accepts]: Start accepts. Automaton has 15117 states and 64138 transitions. Word has length 34 [2022-03-03 19:44:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:30,174 INFO L470 AbstractCegarLoop]: Abstraction has 15117 states and 64138 transitions. [2022-03-03 19:44:30,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 15117 states and 64138 transitions. [2022-03-03 19:44:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:30,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:30,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:30,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:30,427 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,SelfDestructingSolverStorable14 [2022-03-03 19:44:30,428 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2132337696, now seen corresponding path program 6 times [2022-03-03 19:44:30,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:30,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368780650] [2022-03-03 19:44:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:30,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:30,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:30,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368780650] [2022-03-03 19:44:30,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368780650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:30,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455127951] [2022-03-03 19:44:30,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:44:30,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:30,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:30,518 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:30,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:44:30,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:44:30,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:44:30,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:30,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-03 19:44:30,879 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:30,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:44:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:30,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:30,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:30,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:44:31,040 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:31,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2022-03-03 19:44:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:31,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455127951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:31,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:31,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:44:31,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570611219] [2022-03-03 19:44:31,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:31,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:44:31,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:44:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:44:31,147 INFO L87 Difference]: Start difference. First operand 15117 states and 64138 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:31,928 INFO L93 Difference]: Finished difference Result 34003 states and 140197 transitions. [2022-03-03 19:44:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:44:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 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 34 [2022-03-03 19:44:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:32,050 INFO L225 Difference]: With dead ends: 34003 [2022-03-03 19:44:32,050 INFO L226 Difference]: Without dead ends: 33628 [2022-03-03 19:44:32,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:44:32,051 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 302 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:32,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 524 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:44:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33628 states. [2022-03-03 19:44:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33628 to 15249. [2022-03-03 19:44:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15249 states, 15248 states have (on average 4.244753410283316) internal successors, (64724), 15248 states have internal predecessors, (64724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15249 states to 15249 states and 64724 transitions. [2022-03-03 19:44:32,611 INFO L78 Accepts]: Start accepts. Automaton has 15249 states and 64724 transitions. Word has length 34 [2022-03-03 19:44:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:32,612 INFO L470 AbstractCegarLoop]: Abstraction has 15249 states and 64724 transitions. [2022-03-03 19:44:32,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 15249 states and 64724 transitions. [2022-03-03 19:44:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:32,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:32,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:32,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:32,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:32,962 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 688857970, now seen corresponding path program 7 times [2022-03-03 19:44:32,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:32,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162026666] [2022-03-03 19:44:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:32,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:33,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:33,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162026666] [2022-03-03 19:44:33,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162026666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:33,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543885938] [2022-03-03 19:44:33,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:44:33,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:33,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:33,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:33,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:44:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:44:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:33,286 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:33,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-03-03 19:44:33,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-03 19:44:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:33,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:33,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-03 19:44:33,594 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:33,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:44:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:33,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543885938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:33,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:33,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:44:33,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020158571] [2022-03-03 19:44:33,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:33,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:44:33,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:44:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:44:33,723 INFO L87 Difference]: Start difference. First operand 15249 states and 64724 transitions. Second operand has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:34,789 INFO L93 Difference]: Finished difference Result 34268 states and 138723 transitions. [2022-03-03 19:44:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:44:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:34,898 INFO L225 Difference]: With dead ends: 34268 [2022-03-03 19:44:34,898 INFO L226 Difference]: Without dead ends: 34149 [2022-03-03 19:44:34,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:44:34,899 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 303 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:34,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 1030 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:44:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34149 states. [2022-03-03 19:44:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34149 to 15503. [2022-03-03 19:44:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15503 states, 15502 states have (on average 4.245903754354277) internal successors, (65820), 15502 states have internal predecessors, (65820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15503 states to 15503 states and 65820 transitions. [2022-03-03 19:44:35,452 INFO L78 Accepts]: Start accepts. Automaton has 15503 states and 65820 transitions. Word has length 34 [2022-03-03 19:44:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:35,452 INFO L470 AbstractCegarLoop]: Abstraction has 15503 states and 65820 transitions. [2022-03-03 19:44:35,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 15503 states and 65820 transitions. [2022-03-03 19:44:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:35,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:35,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:35,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:35,686 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,SelfDestructingSolverStorable16 [2022-03-03 19:44:35,687 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash -85960544, now seen corresponding path program 8 times [2022-03-03 19:44:35,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:35,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94420578] [2022-03-03 19:44:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:35,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:35,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94420578] [2022-03-03 19:44:35,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94420578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:35,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633581073] [2022-03-03 19:44:35,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:35,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:35,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:35,774 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:35,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:44:35,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:35,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:44:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:36,064 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:36,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-03-03 19:44:36,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:44:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:36,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:36,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:36,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:44:36,388 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:36,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:44:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:36,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633581073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:36,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:36,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:44:36,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264791443] [2022-03-03 19:44:36,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:36,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:44:36,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:36,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:44:36,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:44:36,533 INFO L87 Difference]: Start difference. First operand 15503 states and 65820 transitions. Second operand has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:37,387 INFO L93 Difference]: Finished difference Result 35590 states and 146186 transitions. [2022-03-03 19:44:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:44:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:37,503 INFO L225 Difference]: With dead ends: 35590 [2022-03-03 19:44:37,503 INFO L226 Difference]: Without dead ends: 35471 [2022-03-03 19:44:37,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:44:37,504 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 203 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:37,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 923 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:44:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35471 states. [2022-03-03 19:44:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35471 to 15915. [2022-03-03 19:44:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15915 states, 15914 states have (on average 4.247957773030037) internal successors, (67602), 15914 states have internal predecessors, (67602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15915 states to 15915 states and 67602 transitions. [2022-03-03 19:44:38,126 INFO L78 Accepts]: Start accepts. Automaton has 15915 states and 67602 transitions. Word has length 34 [2022-03-03 19:44:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:38,126 INFO L470 AbstractCegarLoop]: Abstraction has 15915 states and 67602 transitions. [2022-03-03 19:44:38,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 15915 states and 67602 transitions. [2022-03-03 19:44:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:38,163 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:38,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:38,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-03 19:44:38,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:44:38,364 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1963716894, now seen corresponding path program 9 times [2022-03-03 19:44:38,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:38,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987818955] [2022-03-03 19:44:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:38,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:38,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:38,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987818955] [2022-03-03 19:44:38,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987818955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:38,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638356596] [2022-03-03 19:44:38,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:38,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:38,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:38,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:38,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:44:38,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:44:38,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:44:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:38,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-03 19:44:38,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:38,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:44:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:38,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:39,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:39,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:44:39,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:39,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:39,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-03-03 19:44:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:39,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638356596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:39,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:39,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:44:39,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454544440] [2022-03-03 19:44:39,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:39,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:44:39,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:44:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:44:39,647 INFO L87 Difference]: Start difference. First operand 15915 states and 67602 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:40,523 INFO L93 Difference]: Finished difference Result 43231 states and 177155 transitions. [2022-03-03 19:44:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:44:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:40,677 INFO L225 Difference]: With dead ends: 43231 [2022-03-03 19:44:40,677 INFO L226 Difference]: Without dead ends: 42952 [2022-03-03 19:44:40,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:44:40,678 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 509 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:40,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 685 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 348 Invalid, 0 Unknown, 725 Unchecked, 0.2s Time] [2022-03-03 19:44:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42952 states. [2022-03-03 19:44:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42952 to 16642. [2022-03-03 19:44:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16642 states, 16641 states have (on average 4.261042004687218) internal successors, (70908), 16641 states have internal predecessors, (70908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16642 states to 16642 states and 70908 transitions. [2022-03-03 19:44:41,338 INFO L78 Accepts]: Start accepts. Automaton has 16642 states and 70908 transitions. Word has length 34 [2022-03-03 19:44:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:41,339 INFO L470 AbstractCegarLoop]: Abstraction has 16642 states and 70908 transitions. [2022-03-03 19:44:41,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 16642 states and 70908 transitions. [2022-03-03 19:44:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:41,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:41,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:41,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:41,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:41,579 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash -322458472, now seen corresponding path program 10 times [2022-03-03 19:44:41,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:41,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260101711] [2022-03-03 19:44:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:41,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-03 19:44:41,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:41,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260101711] [2022-03-03 19:44:41,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260101711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:44:41,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:44:41,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:44:41,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82195082] [2022-03-03 19:44:41,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:44:41,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:44:41,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:44:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:44:41,595 INFO L87 Difference]: Start difference. First operand 16642 states and 70908 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:41,686 INFO L93 Difference]: Finished difference Result 15458 states and 64217 transitions. [2022-03-03 19:44:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:44:41,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:41,899 INFO L225 Difference]: With dead ends: 15458 [2022-03-03 19:44:41,899 INFO L226 Difference]: Without dead ends: 15458 [2022-03-03 19:44:41,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:44:41,900 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:41,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:44:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15458 states. [2022-03-03 19:44:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15458 to 15458. [2022-03-03 19:44:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15458 states, 15457 states have (on average 4.1545578055250045) internal successors, (64217), 15457 states have internal predecessors, (64217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15458 states to 15458 states and 64217 transitions. [2022-03-03 19:44:42,303 INFO L78 Accepts]: Start accepts. Automaton has 15458 states and 64217 transitions. Word has length 34 [2022-03-03 19:44:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:42,303 INFO L470 AbstractCegarLoop]: Abstraction has 15458 states and 64217 transitions. [2022-03-03 19:44:42,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 15458 states and 64217 transitions. [2022-03-03 19:44:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:42,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:42,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:42,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-03 19:44:42,341 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1234144980, now seen corresponding path program 11 times [2022-03-03 19:44:42,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:42,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248685786] [2022-03-03 19:44:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:42,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:42,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:42,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248685786] [2022-03-03 19:44:42,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248685786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:42,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2553376] [2022-03-03 19:44:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:42,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:42,430 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:42,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:44:42,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:44:42,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:44:42,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:42,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-03 19:44:42,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:42,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:44:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:42,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:42,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:44:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:43,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:43,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-03-03 19:44:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:43,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2553376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:43,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:43,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:44:43,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189160421] [2022-03-03 19:44:43,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:43,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:44:43,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:44:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:44:43,566 INFO L87 Difference]: Start difference. First operand 15458 states and 64217 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:44,105 INFO L93 Difference]: Finished difference Result 22055 states and 89624 transitions. [2022-03-03 19:44:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:44:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:44,182 INFO L225 Difference]: With dead ends: 22055 [2022-03-03 19:44:44,182 INFO L226 Difference]: Without dead ends: 22028 [2022-03-03 19:44:44,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:44:44,183 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 388 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 399 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:44,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 616 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 399 Unchecked, 0.1s Time] [2022-03-03 19:44:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22028 states. [2022-03-03 19:44:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22028 to 16177. [2022-03-03 19:44:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16177 states, 16176 states have (on average 4.15522997032641) internal successors, (67215), 16176 states have internal predecessors, (67215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16177 states to 16177 states and 67215 transitions. [2022-03-03 19:44:44,647 INFO L78 Accepts]: Start accepts. Automaton has 16177 states and 67215 transitions. Word has length 34 [2022-03-03 19:44:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:44,648 INFO L470 AbstractCegarLoop]: Abstraction has 16177 states and 67215 transitions. [2022-03-03 19:44:44,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 16177 states and 67215 transitions. [2022-03-03 19:44:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:44,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:44,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:44,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:44,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:44,887 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash -940416440, now seen corresponding path program 12 times [2022-03-03 19:44:44,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:44,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831772799] [2022-03-03 19:44:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:44,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:44,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:44,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831772799] [2022-03-03 19:44:44,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831772799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:44,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018405600] [2022-03-03 19:44:44,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:44:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:44,963 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:44,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:44:44,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:44:44,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:44,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:44:44,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:45,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-03 19:44:45,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:45,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:44:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:45,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:45,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:45,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:44:45,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:45,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:45,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-03-03 19:44:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:46,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018405600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:46,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:46,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:44:46,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124471363] [2022-03-03 19:44:46,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:46,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:44:46,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:46,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:44:46,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:44:46,043 INFO L87 Difference]: Start difference. First operand 16177 states and 67215 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:46,767 INFO L93 Difference]: Finished difference Result 34514 states and 138148 transitions. [2022-03-03 19:44:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:44:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:46,891 INFO L225 Difference]: With dead ends: 34514 [2022-03-03 19:44:46,891 INFO L226 Difference]: Without dead ends: 34449 [2022-03-03 19:44:46,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:44:46,892 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 393 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:46,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 793 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 333 Invalid, 0 Unknown, 274 Unchecked, 0.2s Time] [2022-03-03 19:44:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34449 states. [2022-03-03 19:44:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34449 to 17226. [2022-03-03 19:44:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17226 states, 17225 states have (on average 4.153381712626996) internal successors, (71542), 17225 states have internal predecessors, (71542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17226 states to 17226 states and 71542 transitions. [2022-03-03 19:44:47,431 INFO L78 Accepts]: Start accepts. Automaton has 17226 states and 71542 transitions. Word has length 34 [2022-03-03 19:44:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:47,431 INFO L470 AbstractCegarLoop]: Abstraction has 17226 states and 71542 transitions. [2022-03-03 19:44:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 17226 states and 71542 transitions. [2022-03-03 19:44:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:47,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:47,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:47,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:47,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:47,669 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash 65719732, now seen corresponding path program 13 times [2022-03-03 19:44:47,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:47,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719529107] [2022-03-03 19:44:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:47,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:47,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:47,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719529107] [2022-03-03 19:44:47,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719529107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:47,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455763033] [2022-03-03 19:44:47,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:44:47,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:47,749 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:47,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:44:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:47,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:44:47,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:48,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-03 19:44:48,067 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:48,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:44:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:48,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:48,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:48,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:44:48,261 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:48,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:44:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:48,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455763033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:48,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:48,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:44:48,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954471775] [2022-03-03 19:44:48,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:48,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:44:48,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:44:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:44:48,417 INFO L87 Difference]: Start difference. First operand 17226 states and 71542 transitions. Second operand has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:49,173 INFO L93 Difference]: Finished difference Result 32260 states and 130507 transitions. [2022-03-03 19:44:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:44:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:49,433 INFO L225 Difference]: With dead ends: 32260 [2022-03-03 19:44:49,434 INFO L226 Difference]: Without dead ends: 32121 [2022-03-03 19:44:49,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:44:49,434 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 243 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 594 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:44:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32121 states. [2022-03-03 19:44:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32121 to 16166. [2022-03-03 19:44:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16166 states, 16165 states have (on average 4.160222703371482) internal successors, (67250), 16165 states have internal predecessors, (67250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16166 states to 16166 states and 67250 transitions. [2022-03-03 19:44:49,957 INFO L78 Accepts]: Start accepts. Automaton has 16166 states and 67250 transitions. Word has length 34 [2022-03-03 19:44:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:49,957 INFO L470 AbstractCegarLoop]: Abstraction has 16166 states and 67250 transitions. [2022-03-03 19:44:49,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 16166 states and 67250 transitions. [2022-03-03 19:44:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:49,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:49,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:50,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-03 19:44:50,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 19:44:50,192 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash -254518890, now seen corresponding path program 14 times [2022-03-03 19:44:50,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:50,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162025596] [2022-03-03 19:44:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:50,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:50,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:50,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162025596] [2022-03-03 19:44:50,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162025596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:50,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237972624] [2022-03-03 19:44:50,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:50,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:50,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:50,294 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:50,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:44:50,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:50,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:44:50,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:50,536 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:50,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-03-03 19:44:50,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:44:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:50,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:50,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:50,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:44:50,756 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:50,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:44:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:50,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237972624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:50,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:50,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:44:50,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713350727] [2022-03-03 19:44:50,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:50,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:44:50,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:50,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:44:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:44:50,934 INFO L87 Difference]: Start difference. First operand 16166 states and 67250 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:51,937 INFO L93 Difference]: Finished difference Result 36820 states and 149638 transitions. [2022-03-03 19:44:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:44:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 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 34 [2022-03-03 19:44:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:52,100 INFO L225 Difference]: With dead ends: 36820 [2022-03-03 19:44:52,100 INFO L226 Difference]: Without dead ends: 36745 [2022-03-03 19:44:52,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:44:52,101 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 302 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:52,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 914 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:44:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36745 states. [2022-03-03 19:44:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36745 to 18605. [2022-03-03 19:44:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18605 states, 18604 states have (on average 4.177703719630187) internal successors, (77722), 18604 states have internal predecessors, (77722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18605 states to 18605 states and 77722 transitions. [2022-03-03 19:44:52,791 INFO L78 Accepts]: Start accepts. Automaton has 18605 states and 77722 transitions. Word has length 34 [2022-03-03 19:44:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:52,791 INFO L470 AbstractCegarLoop]: Abstraction has 18605 states and 77722 transitions. [2022-03-03 19:44:52,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 18605 states and 77722 transitions. [2022-03-03 19:44:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:52,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:52,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:52,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:53,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:44:53,034 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2132275240, now seen corresponding path program 15 times [2022-03-03 19:44:53,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:53,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574373787] [2022-03-03 19:44:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:53,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:53,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:53,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574373787] [2022-03-03 19:44:53,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574373787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:53,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755020629] [2022-03-03 19:44:53,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:53,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:53,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:53,120 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:53,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:44:53,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:44:53,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:44:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:53,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-03-03 19:44:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:53,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:53,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-03-03 19:44:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:53,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:53,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:53,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-03-03 19:44:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:54,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:54,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:54,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2022-03-03 19:44:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:54,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755020629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:54,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:54,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-03 19:44:54,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951900669] [2022-03-03 19:44:54,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:54,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:44:54,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:44:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:44:54,171 INFO L87 Difference]: Start difference. First operand 18605 states and 77722 transitions. Second operand has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:55,450 INFO L93 Difference]: Finished difference Result 35773 states and 145966 transitions. [2022-03-03 19:44:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:44:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:55,590 INFO L225 Difference]: With dead ends: 35773 [2022-03-03 19:44:55,590 INFO L226 Difference]: Without dead ends: 35618 [2022-03-03 19:44:55,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:44:55,591 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 534 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:55,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 1408 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 668 Invalid, 0 Unknown, 614 Unchecked, 0.3s Time] [2022-03-03 19:44:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35618 states. [2022-03-03 19:44:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35618 to 20436. [2022-03-03 19:44:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20436 states, 20435 states have (on average 4.189038414484952) internal successors, (85603), 20435 states have internal predecessors, (85603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20436 states to 20436 states and 85603 transitions. [2022-03-03 19:44:56,293 INFO L78 Accepts]: Start accepts. Automaton has 20436 states and 85603 transitions. Word has length 34 [2022-03-03 19:44:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:56,293 INFO L470 AbstractCegarLoop]: Abstraction has 20436 states and 85603 transitions. [2022-03-03 19:44:56,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20436 states and 85603 transitions. [2022-03-03 19:44:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:56,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:56,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:56,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:56,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:56,546 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash 564892184, now seen corresponding path program 16 times [2022-03-03 19:44:56,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:56,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064783157] [2022-03-03 19:44:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:56,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:56,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064783157] [2022-03-03 19:44:56,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064783157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:56,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38582550] [2022-03-03 19:44:56,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:44:56,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:56,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:56,652 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:56,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:44:56,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:44:56,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:56,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:44:56,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:56,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-03 19:44:56,998 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:56,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:44:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:57,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:57,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:57,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:44:57,173 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:57,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:44:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:57,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38582550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:57,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:57,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:44:57,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433204854] [2022-03-03 19:44:57,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:57,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:44:57,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:44:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:44:57,321 INFO L87 Difference]: Start difference. First operand 20436 states and 85603 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:58,409 INFO L93 Difference]: Finished difference Result 37393 states and 152399 transitions. [2022-03-03 19:44:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:44:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:44:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:58,561 INFO L225 Difference]: With dead ends: 37393 [2022-03-03 19:44:58,562 INFO L226 Difference]: Without dead ends: 37158 [2022-03-03 19:44:58,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:44:58,562 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 339 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:58,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 865 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:44:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37158 states. [2022-03-03 19:44:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37158 to 20034. [2022-03-03 19:44:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20034 states, 20033 states have (on average 4.198821943792742) internal successors, (84115), 20033 states have internal predecessors, (84115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20034 states to 20034 states and 84115 transitions. [2022-03-03 19:44:59,305 INFO L78 Accepts]: Start accepts. Automaton has 20034 states and 84115 transitions. Word has length 34 [2022-03-03 19:44:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:59,305 INFO L470 AbstractCegarLoop]: Abstraction has 20034 states and 84115 transitions. [2022-03-03 19:44:59,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 20034 states and 84115 transitions. [2022-03-03 19:44:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:44:59,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:59,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:59,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:59,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:59,557 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:44:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1426514422, now seen corresponding path program 17 times [2022-03-03 19:44:59,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:59,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112869070] [2022-03-03 19:44:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:59,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:59,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:59,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112869070] [2022-03-03 19:44:59,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112869070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:59,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910823518] [2022-03-03 19:44:59,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:59,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:59,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:59,655 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:59,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:44:59,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:44:59,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:44:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:59,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:59,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2022-03-03 19:45:00,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-03 19:45:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:00,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:00,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:00,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:00,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:00,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:00,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:00,859 INFO L353 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-03-03 19:45:00,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 29 [2022-03-03 19:45:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:00,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910823518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:00,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:00,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-03 19:45:00,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628272678] [2022-03-03 19:45:00,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:00,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:45:00,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:00,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:45:00,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:45:00,888 INFO L87 Difference]: Start difference. First operand 20034 states and 84115 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:02,067 INFO L93 Difference]: Finished difference Result 45548 states and 186838 transitions. [2022-03-03 19:45:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:45:02,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:02,266 INFO L225 Difference]: With dead ends: 45548 [2022-03-03 19:45:02,266 INFO L226 Difference]: Without dead ends: 45541 [2022-03-03 19:45:02,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:45:02,266 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 571 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:02,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 1437 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1066 Invalid, 0 Unknown, 711 Unchecked, 0.5s Time] [2022-03-03 19:45:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45541 states. [2022-03-03 19:45:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45541 to 21825. [2022-03-03 19:45:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21825 states, 21824 states have (on average 4.198222140762463) internal successors, (91622), 21824 states have internal predecessors, (91622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21825 states to 21825 states and 91622 transitions. [2022-03-03 19:45:03,116 INFO L78 Accepts]: Start accepts. Automaton has 21825 states and 91622 transitions. Word has length 34 [2022-03-03 19:45:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:03,116 INFO L470 AbstractCegarLoop]: Abstraction has 21825 states and 91622 transitions. [2022-03-03 19:45:03,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 21825 states and 91622 transitions. [2022-03-03 19:45:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:03,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:03,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:03,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:03,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:45:03,504 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash 152865354, now seen corresponding path program 18 times [2022-03-03 19:45:03,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:03,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622823581] [2022-03-03 19:45:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:03,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:03,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:03,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622823581] [2022-03-03 19:45:03,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622823581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:03,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887773085] [2022-03-03 19:45:03,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:03,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:03,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:03,610 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:03,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:45:03,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:45:03,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:45:03,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:03,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:03,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 42 [2022-03-03 19:45:04,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:45:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:04,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:04,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:04,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:04,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:04,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 37 [2022-03-03 19:45:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:04,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887773085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:04,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:04,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-03 19:45:04,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978523651] [2022-03-03 19:45:04,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:04,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:45:04,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:45:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:45:04,651 INFO L87 Difference]: Start difference. First operand 21825 states and 91622 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:06,397 INFO L93 Difference]: Finished difference Result 54036 states and 219531 transitions. [2022-03-03 19:45:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:45:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:06,692 INFO L225 Difference]: With dead ends: 54036 [2022-03-03 19:45:06,692 INFO L226 Difference]: Without dead ends: 53961 [2022-03-03 19:45:06,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:45:06,693 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 629 mSDsluCounter, 2445 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:06,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 1936 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1468 Invalid, 0 Unknown, 637 Unchecked, 0.6s Time] [2022-03-03 19:45:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53961 states. [2022-03-03 19:45:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53961 to 22826. [2022-03-03 19:45:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22826 states, 22825 states have (on average 4.186987951807229) internal successors, (95568), 22825 states have internal predecessors, (95568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22826 states to 22826 states and 95568 transitions. [2022-03-03 19:45:07,675 INFO L78 Accepts]: Start accepts. Automaton has 22826 states and 95568 transitions. Word has length 34 [2022-03-03 19:45:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:07,676 INFO L470 AbstractCegarLoop]: Abstraction has 22826 states and 95568 transitions. [2022-03-03 19:45:07,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22826 states and 95568 transitions. [2022-03-03 19:45:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:07,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:07,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:07,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-03 19:45:07,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:45:07,929 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1913314904, now seen corresponding path program 19 times [2022-03-03 19:45:07,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:07,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216171214] [2022-03-03 19:45:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:08,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:08,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216171214] [2022-03-03 19:45:08,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216171214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:08,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045474174] [2022-03-03 19:45:08,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:08,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:08,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:08,030 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:08,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:45:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:08,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:08,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-03-03 19:45:08,387 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:08,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:08,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:08,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:08,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:45:08,673 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:08,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:45:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:08,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045474174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:08,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:08,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:45:08,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032397221] [2022-03-03 19:45:08,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:08,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:45:08,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:45:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:45:08,815 INFO L87 Difference]: Start difference. First operand 22826 states and 95568 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:09,791 INFO L93 Difference]: Finished difference Result 38183 states and 155599 transitions. [2022-03-03 19:45:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:45:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:09,943 INFO L225 Difference]: With dead ends: 38183 [2022-03-03 19:45:09,943 INFO L226 Difference]: Without dead ends: 38028 [2022-03-03 19:45:09,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:45:09,944 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 396 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:09,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 677 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:45:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38028 states. [2022-03-03 19:45:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38028 to 23842. [2022-03-03 19:45:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 23841 states have (on average 4.1980621618220715) internal successors, (100086), 23841 states have internal predecessors, (100086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 100086 transitions. [2022-03-03 19:45:10,792 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 100086 transitions. Word has length 34 [2022-03-03 19:45:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:10,792 INFO L470 AbstractCegarLoop]: Abstraction has 23842 states and 100086 transitions. [2022-03-03 19:45:10,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 100086 transitions. [2022-03-03 19:45:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:10,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:10,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:10,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-03 19:45:11,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:45:11,048 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -227262226, now seen corresponding path program 20 times [2022-03-03 19:45:11,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:11,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61971242] [2022-03-03 19:45:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:11,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:11,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61971242] [2022-03-03 19:45:11,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61971242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:11,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673169111] [2022-03-03 19:45:11,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:11,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:11,164 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:11,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:45:11,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:11,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:11,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-03 19:45:11,462 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:11,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:11,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:11,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:11,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:45:11,675 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:11,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:45:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:11,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673169111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:11,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:11,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:45:11,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475732158] [2022-03-03 19:45:11,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:11,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:45:11,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:45:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:45:11,816 INFO L87 Difference]: Start difference. First operand 23842 states and 100086 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:12,908 INFO L93 Difference]: Finished difference Result 41598 states and 169784 transitions. [2022-03-03 19:45:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:45:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:13,065 INFO L225 Difference]: With dead ends: 41598 [2022-03-03 19:45:13,065 INFO L226 Difference]: Without dead ends: 41443 [2022-03-03 19:45:13,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:45:13,066 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 543 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:13,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 711 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:45:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41443 states. [2022-03-03 19:45:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41443 to 23634. [2022-03-03 19:45:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23634 states, 23633 states have (on average 4.196081750095206) internal successors, (99166), 23633 states have internal predecessors, (99166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23634 states to 23634 states and 99166 transitions. [2022-03-03 19:45:13,981 INFO L78 Accepts]: Start accepts. Automaton has 23634 states and 99166 transitions. Word has length 34 [2022-03-03 19:45:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:13,982 INFO L470 AbstractCegarLoop]: Abstraction has 23634 states and 99166 transitions. [2022-03-03 19:45:13,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 23634 states and 99166 transitions. [2022-03-03 19:45:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:14,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:14,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:14,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:14,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:14,248 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:14,248 INFO L85 PathProgramCache]: Analyzing trace with hash -265706046, now seen corresponding path program 21 times [2022-03-03 19:45:14,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:14,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667224945] [2022-03-03 19:45:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:14,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:14,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:14,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667224945] [2022-03-03 19:45:14,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667224945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:14,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853105897] [2022-03-03 19:45:14,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:14,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:14,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:14,359 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:14,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:45:14,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:45:14,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:45:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:14,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:14,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2022-03-03 19:45:14,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-03-03 19:45:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:14,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:15,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:15,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:15,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:15,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-03-03 19:45:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:15,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853105897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:15,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:15,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:45:15,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239831905] [2022-03-03 19:45:15,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:15,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:45:15,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:45:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:45:15,638 INFO L87 Difference]: Start difference. First operand 23634 states and 99166 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:16,962 INFO L93 Difference]: Finished difference Result 55591 states and 225533 transitions. [2022-03-03 19:45:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:45:16,962 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:17,168 INFO L225 Difference]: With dead ends: 55591 [2022-03-03 19:45:17,168 INFO L226 Difference]: Without dead ends: 55401 [2022-03-03 19:45:17,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:45:17,169 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 560 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:17,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1433 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 729 Invalid, 0 Unknown, 763 Unchecked, 0.3s Time] [2022-03-03 19:45:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55401 states. [2022-03-03 19:45:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55401 to 25814. [2022-03-03 19:45:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25814 states, 25813 states have (on average 4.203075969472747) internal successors, (108494), 25813 states have internal predecessors, (108494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25814 states to 25814 states and 108494 transitions. [2022-03-03 19:45:18,218 INFO L78 Accepts]: Start accepts. Automaton has 25814 states and 108494 transitions. Word has length 34 [2022-03-03 19:45:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:18,218 INFO L470 AbstractCegarLoop]: Abstraction has 25814 states and 108494 transitions. [2022-03-03 19:45:18,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25814 states and 108494 transitions. [2022-03-03 19:45:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:18,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:18,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:18,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:18,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:18,481 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 814906250, now seen corresponding path program 22 times [2022-03-03 19:45:18,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:18,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557726643] [2022-03-03 19:45:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:18,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:18,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557726643] [2022-03-03 19:45:18,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557726643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:18,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856648500] [2022-03-03 19:45:18,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:18,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:18,582 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:18,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:45:18,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:18,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:18,904 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:18,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-03-03 19:45:18,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:45:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:18,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:19,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:19,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:45:19,135 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:19,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:45:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:19,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856648500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:19,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:19,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:45:19,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597882470] [2022-03-03 19:45:19,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:19,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:45:19,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:45:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:45:19,270 INFO L87 Difference]: Start difference. First operand 25814 states and 108494 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:20,762 INFO L93 Difference]: Finished difference Result 48403 states and 197614 transitions. [2022-03-03 19:45:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:45:20,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:20,948 INFO L225 Difference]: With dead ends: 48403 [2022-03-03 19:45:20,948 INFO L226 Difference]: Without dead ends: 48328 [2022-03-03 19:45:20,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:45:20,949 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 429 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:20,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 1220 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:45:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48328 states. [2022-03-03 19:45:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48328 to 21502. [2022-03-03 19:45:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21502 states, 21501 states have (on average 4.2105948560532065) internal successors, (90532), 21501 states have internal predecessors, (90532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21502 states to 21502 states and 90532 transitions. [2022-03-03 19:45:21,892 INFO L78 Accepts]: Start accepts. Automaton has 21502 states and 90532 transitions. Word has length 34 [2022-03-03 19:45:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:21,892 INFO L470 AbstractCegarLoop]: Abstraction has 21502 states and 90532 transitions. [2022-03-03 19:45:21,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 21502 states and 90532 transitions. [2022-03-03 19:45:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:21,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:21,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:21,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:22,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:22,141 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -34733292, now seen corresponding path program 23 times [2022-03-03 19:45:22,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:22,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477441066] [2022-03-03 19:45:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:22,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:22,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477441066] [2022-03-03 19:45:22,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477441066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:22,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658432856] [2022-03-03 19:45:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:22,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:22,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:22,224 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:22,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:45:22,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:45:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:22,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:45:22,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:22,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:22,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:22,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2022-03-03 19:45:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:22,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:22,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:22,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-03 19:45:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:22,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:22,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:22,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:22,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-03 19:45:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:22,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658432856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:22,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:22,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-03 19:45:22,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640880030] [2022-03-03 19:45:22,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:22,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:45:22,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:22,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:45:22,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:45:22,980 INFO L87 Difference]: Start difference. First operand 21502 states and 90532 transitions. Second operand has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:25,151 INFO L93 Difference]: Finished difference Result 58354 states and 237157 transitions. [2022-03-03 19:45:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:45:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:25,415 INFO L225 Difference]: With dead ends: 58354 [2022-03-03 19:45:25,416 INFO L226 Difference]: Without dead ends: 58179 [2022-03-03 19:45:25,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:45:25,417 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 898 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:25,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1563 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1443 Invalid, 0 Unknown, 796 Unchecked, 0.7s Time] [2022-03-03 19:45:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58179 states. [2022-03-03 19:45:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58179 to 21233. [2022-03-03 19:45:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21233 states, 21232 states have (on average 4.2159947249434815) internal successors, (89514), 21232 states have internal predecessors, (89514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 89514 transitions. [2022-03-03 19:45:26,477 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 89514 transitions. Word has length 34 [2022-03-03 19:45:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:26,477 INFO L470 AbstractCegarLoop]: Abstraction has 21233 states and 89514 transitions. [2022-03-03 19:45:26,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 89514 transitions. [2022-03-03 19:45:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:26,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:26,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:26,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:26,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-03 19:45:26,725 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 475063918, now seen corresponding path program 24 times [2022-03-03 19:45:26,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:26,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743964689] [2022-03-03 19:45:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:26,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:26,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743964689] [2022-03-03 19:45:26,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743964689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:26,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004675734] [2022-03-03 19:45:26,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:26,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:26,841 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:26,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:45:26,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:45:26,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:26,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:45:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:27,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:45:27,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:27,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:27,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-03-03 19:45:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:27,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:27,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:27,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:28,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:28,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:28,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 37 [2022-03-03 19:45:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:28,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004675734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:28,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:28,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:45:28,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214407127] [2022-03-03 19:45:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:28,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:45:28,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:45:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:45:28,125 INFO L87 Difference]: Start difference. First operand 21233 states and 89514 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:29,644 INFO L93 Difference]: Finished difference Result 60814 states and 246454 transitions. [2022-03-03 19:45:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:45:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:29,901 INFO L225 Difference]: With dead ends: 60814 [2022-03-03 19:45:29,901 INFO L226 Difference]: Without dead ends: 60632 [2022-03-03 19:45:29,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=594, Invalid=2376, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:45:29,902 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 995 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:29,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 1245 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 593 Invalid, 0 Unknown, 1100 Unchecked, 0.3s Time] [2022-03-03 19:45:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60632 states. [2022-03-03 19:45:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60632 to 21618. [2022-03-03 19:45:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21618 states, 21617 states have (on average 4.218346671601055) internal successors, (91188), 21617 states have internal predecessors, (91188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21618 states to 21618 states and 91188 transitions. [2022-03-03 19:45:31,016 INFO L78 Accepts]: Start accepts. Automaton has 21618 states and 91188 transitions. Word has length 34 [2022-03-03 19:45:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:31,016 INFO L470 AbstractCegarLoop]: Abstraction has 21618 states and 91188 transitions. [2022-03-03 19:45:31,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21618 states and 91188 transitions. [2022-03-03 19:45:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:31,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:31,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:31,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:31,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:31,262 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1710694510, now seen corresponding path program 25 times [2022-03-03 19:45:31,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:31,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738088123] [2022-03-03 19:45:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:31,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:31,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738088123] [2022-03-03 19:45:31,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738088123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:31,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684174836] [2022-03-03 19:45:31,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:31,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:31,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:31,360 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:31,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:45:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:31,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:31,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:45:31,668 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:31,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:31,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:31,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:31,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:45:31,883 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:31,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:45:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:32,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684174836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:32,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:32,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:45:32,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592072932] [2022-03-03 19:45:32,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:32,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:45:32,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:45:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:45:32,028 INFO L87 Difference]: Start difference. First operand 21618 states and 91188 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 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) [2022-03-03 19:45:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:33,179 INFO L93 Difference]: Finished difference Result 39667 states and 162155 transitions. [2022-03-03 19:45:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:45:33,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 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 34 [2022-03-03 19:45:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:33,334 INFO L225 Difference]: With dead ends: 39667 [2022-03-03 19:45:33,334 INFO L226 Difference]: Without dead ends: 39552 [2022-03-03 19:45:33,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:45:33,335 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 544 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 636 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:45:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39552 states. [2022-03-03 19:45:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39552 to 21470. [2022-03-03 19:45:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21470 states, 21469 states have (on average 4.215147421864083) internal successors, (90495), 21469 states have internal predecessors, (90495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21470 states to 21470 states and 90495 transitions. [2022-03-03 19:45:34,023 INFO L78 Accepts]: Start accepts. Automaton has 21470 states and 90495 transitions. Word has length 34 [2022-03-03 19:45:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:34,023 INFO L470 AbstractCegarLoop]: Abstraction has 21470 states and 90495 transitions. [2022-03-03 19:45:34,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 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) [2022-03-03 19:45:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 21470 states and 90495 transitions. [2022-03-03 19:45:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:34,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:34,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:34,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:34,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:34,268 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1276481494, now seen corresponding path program 26 times [2022-03-03 19:45:34,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:34,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997548364] [2022-03-03 19:45:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:34,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:34,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:34,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997548364] [2022-03-03 19:45:34,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997548364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:34,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797028962] [2022-03-03 19:45:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:34,352 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:34,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:45:34,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:34,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:34,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:45:34,635 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:34,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:34,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:34,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:34,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:45:34,830 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:34,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-03-03 19:45:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:34,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797028962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:34,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:34,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:45:34,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311667247] [2022-03-03 19:45:34,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:34,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:45:34,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:45:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:45:34,984 INFO L87 Difference]: Start difference. First operand 21470 states and 90495 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:35,991 INFO L93 Difference]: Finished difference Result 39024 states and 159882 transitions. [2022-03-03 19:45:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:45:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:36,134 INFO L225 Difference]: With dead ends: 39024 [2022-03-03 19:45:36,134 INFO L226 Difference]: Without dead ends: 38789 [2022-03-03 19:45:36,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:45:36,135 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 489 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:36,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 757 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:45:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38789 states. [2022-03-03 19:45:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38789 to 21578. [2022-03-03 19:45:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21578 states, 21577 states have (on average 4.215553598739398) internal successors, (90959), 21577 states have internal predecessors, (90959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21578 states to 21578 states and 90959 transitions. [2022-03-03 19:45:36,920 INFO L78 Accepts]: Start accepts. Automaton has 21578 states and 90959 transitions. Word has length 34 [2022-03-03 19:45:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 21578 states and 90959 transitions. [2022-03-03 19:45:36,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 21578 states and 90959 transitions. [2022-03-03 19:45:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:36,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:36,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:36,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:45:37,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 19:45:37,174 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2050047720, now seen corresponding path program 27 times [2022-03-03 19:45:37,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:37,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264417051] [2022-03-03 19:45:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:37,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:37,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264417051] [2022-03-03 19:45:37,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264417051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:37,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983739669] [2022-03-03 19:45:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:37,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:37,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:37,255 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:37,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:45:37,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:45:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:45:37,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:37,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:37,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-03-03 19:45:37,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:45:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:37,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:38,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:38,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:38,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:38,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:38,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2022-03-03 19:45:38,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:38,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-03-03 19:45:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:38,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983739669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:38,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:38,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:45:38,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798424962] [2022-03-03 19:45:38,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:38,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:45:38,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:45:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:45:38,284 INFO L87 Difference]: Start difference. First operand 21578 states and 90959 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:40,434 INFO L93 Difference]: Finished difference Result 50001 states and 205293 transitions. [2022-03-03 19:45:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:45:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:40,649 INFO L225 Difference]: With dead ends: 50001 [2022-03-03 19:45:40,649 INFO L226 Difference]: Without dead ends: 49998 [2022-03-03 19:45:40,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:45:40,650 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 448 mSDsluCounter, 2836 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:40,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 2157 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1975 Invalid, 0 Unknown, 812 Unchecked, 0.8s Time] [2022-03-03 19:45:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49998 states. [2022-03-03 19:45:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49998 to 24569. [2022-03-03 19:45:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24569 states, 24568 states have (on average 4.228997069358515) internal successors, (103898), 24568 states have internal predecessors, (103898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24569 states to 24569 states and 103898 transitions. [2022-03-03 19:45:41,590 INFO L78 Accepts]: Start accepts. Automaton has 24569 states and 103898 transitions. Word has length 34 [2022-03-03 19:45:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:41,590 INFO L470 AbstractCegarLoop]: Abstraction has 24569 states and 103898 transitions. [2022-03-03 19:45:41,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 24569 states and 103898 transitions. [2022-03-03 19:45:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:41,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:41,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:41,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:45:41,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:45:41,848 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1244096684, now seen corresponding path program 28 times [2022-03-03 19:45:41,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:41,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105052775] [2022-03-03 19:45:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:41,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105052775] [2022-03-03 19:45:41,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105052775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:41,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542936049] [2022-03-03 19:45:41,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:41,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:41,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:41,927 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:41,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:45:41,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:41,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:42,167 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:42,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-03-03 19:45:42,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:45:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:42,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:42,320 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:42,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 53 [2022-03-03 19:45:42,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:42,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:42,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542936049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:42,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:42,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:45:42,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728198516] [2022-03-03 19:45:42,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:42,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:45:42,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:42,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:45:42,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:45:42,486 INFO L87 Difference]: Start difference. First operand 24569 states and 103898 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:43,675 INFO L93 Difference]: Finished difference Result 42515 states and 175341 transitions. [2022-03-03 19:45:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:45:43,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:43,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:43,835 INFO L225 Difference]: With dead ends: 42515 [2022-03-03 19:45:43,835 INFO L226 Difference]: Without dead ends: 42440 [2022-03-03 19:45:43,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:45:43,836 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 298 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:43,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1159 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:45:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42440 states. [2022-03-03 19:45:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42440 to 23046. [2022-03-03 19:45:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23046 states, 23045 states have (on average 4.219440225645476) internal successors, (97237), 23045 states have internal predecessors, (97237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23046 states to 23046 states and 97237 transitions. [2022-03-03 19:45:44,746 INFO L78 Accepts]: Start accepts. Automaton has 23046 states and 97237 transitions. Word has length 34 [2022-03-03 19:45:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:44,746 INFO L470 AbstractCegarLoop]: Abstraction has 23046 states and 97237 transitions. [2022-03-03 19:45:44,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 23046 states and 97237 transitions. [2022-03-03 19:45:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:44,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:44,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:44,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:45,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:45:45,007 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash 172291370, now seen corresponding path program 29 times [2022-03-03 19:45:45,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:45,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602646455] [2022-03-03 19:45:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:45,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:45,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:45,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602646455] [2022-03-03 19:45:45,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602646455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:45,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960642611] [2022-03-03 19:45:45,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:45,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:45,088 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:45,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:45:45,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:45:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:45,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-03 19:45:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:45,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:45,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-03-03 19:45:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:45,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:46,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:46,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:46,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:46,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-03-03 19:45:46,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:46,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:45:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:46,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960642611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:46,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:46,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-03-03 19:45:46,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255222502] [2022-03-03 19:45:46,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:46,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:45:46,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:45:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:45:46,231 INFO L87 Difference]: Start difference. First operand 23046 states and 97237 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:47,019 INFO L93 Difference]: Finished difference Result 42887 states and 177253 transitions. [2022-03-03 19:45:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:45:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:47,363 INFO L225 Difference]: With dead ends: 42887 [2022-03-03 19:45:47,364 INFO L226 Difference]: Without dead ends: 42712 [2022-03-03 19:45:47,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:45:47,364 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 435 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 693 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:47,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 802 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 514 Invalid, 0 Unknown, 693 Unchecked, 0.2s Time] [2022-03-03 19:45:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42712 states. [2022-03-03 19:45:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42712 to 24256. [2022-03-03 19:45:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24256 states, 24255 states have (on average 4.222345908060194) internal successors, (102413), 24255 states have internal predecessors, (102413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24256 states to 24256 states and 102413 transitions. [2022-03-03 19:45:48,120 INFO L78 Accepts]: Start accepts. Automaton has 24256 states and 102413 transitions. Word has length 34 [2022-03-03 19:45:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:48,120 INFO L470 AbstractCegarLoop]: Abstraction has 24256 states and 102413 transitions. [2022-03-03 19:45:48,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 24256 states and 102413 transitions. [2022-03-03 19:45:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:48,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:48,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:48,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:48,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:45:48,379 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1425508502, now seen corresponding path program 30 times [2022-03-03 19:45:48,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:48,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858495053] [2022-03-03 19:45:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:48,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:48,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858495053] [2022-03-03 19:45:48,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858495053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:48,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309849743] [2022-03-03 19:45:48,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:48,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:48,468 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:48,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:45:48,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:45:48,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:45:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:48,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-03 19:45:48,791 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:48,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:48,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:48,919 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:48,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 54 [2022-03-03 19:45:49,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:49,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:49,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309849743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:49,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:49,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:45:49,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610521417] [2022-03-03 19:45:49,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:49,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:45:49,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:45:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:45:49,065 INFO L87 Difference]: Start difference. First operand 24256 states and 102413 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:49,961 INFO L93 Difference]: Finished difference Result 42594 states and 176009 transitions. [2022-03-03 19:45:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:45:49,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 34 [2022-03-03 19:45:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:50,124 INFO L225 Difference]: With dead ends: 42594 [2022-03-03 19:45:50,124 INFO L226 Difference]: Without dead ends: 42319 [2022-03-03 19:45:50,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:45:50,124 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 226 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:50,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 818 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:45:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42319 states. [2022-03-03 19:45:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42319 to 23176. [2022-03-03 19:45:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23176 states, 23175 states have (on average 4.224250269687163) internal successors, (97897), 23175 states have internal predecessors, (97897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23176 states to 23176 states and 97897 transitions. [2022-03-03 19:45:51,110 INFO L78 Accepts]: Start accepts. Automaton has 23176 states and 97897 transitions. Word has length 34 [2022-03-03 19:45:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:51,110 INFO L470 AbstractCegarLoop]: Abstraction has 23176 states and 97897 transitions. [2022-03-03 19:45:51,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23176 states and 97897 transitions. [2022-03-03 19:45:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:51,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:51,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:51,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-03 19:45:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:45:51,376 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2077304384, now seen corresponding path program 31 times [2022-03-03 19:45:51,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:51,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505383758] [2022-03-03 19:45:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:51,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:51,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:51,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505383758] [2022-03-03 19:45:51,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505383758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:51,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450088778] [2022-03-03 19:45:51,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:51,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:51,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:51,504 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:51,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:45:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:51,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:51,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-03 19:45:51,808 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:51,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:51,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:51,989 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:51,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 53 [2022-03-03 19:45:52,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:52,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:52,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450088778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:52,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:52,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:45:52,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325082132] [2022-03-03 19:45:52,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:52,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:45:52,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:45:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:45:52,149 INFO L87 Difference]: Start difference. First operand 23176 states and 97897 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:52,999 INFO L93 Difference]: Finished difference Result 39651 states and 163704 transitions. [2022-03-03 19:45:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:45:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:53,153 INFO L225 Difference]: With dead ends: 39651 [2022-03-03 19:45:53,153 INFO L226 Difference]: Without dead ends: 39536 [2022-03-03 19:45:53,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:45:53,154 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 301 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:53,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 734 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:45:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39536 states. [2022-03-03 19:45:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39536 to 23176. [2022-03-03 19:45:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23176 states, 23175 states have (on average 4.224250269687163) internal successors, (97897), 23175 states have internal predecessors, (97897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23176 states to 23176 states and 97897 transitions. [2022-03-03 19:45:54,011 INFO L78 Accepts]: Start accepts. Automaton has 23176 states and 97897 transitions. Word has length 34 [2022-03-03 19:45:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:54,011 INFO L470 AbstractCegarLoop]: Abstraction has 23176 states and 97897 transitions. [2022-03-03 19:45:54,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 23176 states and 97897 transitions. [2022-03-03 19:45:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:54,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:54,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:54,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 19:45:54,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-03 19:45:54,264 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1515336768, now seen corresponding path program 32 times [2022-03-03 19:45:54,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:54,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361637360] [2022-03-03 19:45:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:54,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:54,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:54,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361637360] [2022-03-03 19:45:54,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361637360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:54,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804428699] [2022-03-03 19:45:54,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:54,372 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:54,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:45:54,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:54,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:54,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:45:54,680 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:54,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:54,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:54,844 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:54,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 53 [2022-03-03 19:45:54,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:54,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:45:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:55,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804428699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:55,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:55,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:45:55,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333124588] [2022-03-03 19:45:55,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:55,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:45:55,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:45:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:45:55,023 INFO L87 Difference]: Start difference. First operand 23176 states and 97897 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:56,142 INFO L93 Difference]: Finished difference Result 43495 states and 178268 transitions. [2022-03-03 19:45:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:45:56,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:56,309 INFO L225 Difference]: With dead ends: 43495 [2022-03-03 19:45:56,309 INFO L226 Difference]: Without dead ends: 43340 [2022-03-03 19:45:56,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:45:56,309 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 478 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:56,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 773 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:45:56,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43340 states. [2022-03-03 19:45:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43340 to 23188. [2022-03-03 19:45:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23188 states, 23187 states have (on average 4.224565489282788) internal successors, (97955), 23187 states have internal predecessors, (97955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23188 states to 23188 states and 97955 transitions. [2022-03-03 19:45:57,142 INFO L78 Accepts]: Start accepts. Automaton has 23188 states and 97955 transitions. Word has length 34 [2022-03-03 19:45:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:57,142 INFO L470 AbstractCegarLoop]: Abstraction has 23188 states and 97955 transitions. [2022-03-03 19:45:57,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23188 states and 97955 transitions. [2022-03-03 19:45:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:45:57,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:57,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:57,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:57,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-03 19:45:57,397 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:45:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1028085116, now seen corresponding path program 33 times [2022-03-03 19:45:57,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:57,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222897222] [2022-03-03 19:45:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:57,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:57,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222897222] [2022-03-03 19:45:57,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222897222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:57,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939925868] [2022-03-03 19:45:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:57,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:57,477 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:57,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:45:57,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:45:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:45:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:57,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:45:57,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:57,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:45:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:57,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:58,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:58,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:58,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 42 [2022-03-03 19:45:58,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:58,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:45:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:58,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939925868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:58,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:58,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-03 19:45:58,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625108345] [2022-03-03 19:45:58,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:58,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:45:58,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:58,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:45:58,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:45:58,447 INFO L87 Difference]: Start difference. First operand 23188 states and 97955 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:59,926 INFO L93 Difference]: Finished difference Result 51532 states and 211113 transitions. [2022-03-03 19:45:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:45:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:45:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:00,209 INFO L225 Difference]: With dead ends: 51532 [2022-03-03 19:46:00,209 INFO L226 Difference]: Without dead ends: 51097 [2022-03-03 19:46:00,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:46:00,210 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 743 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:00,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1103 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1011 Invalid, 0 Unknown, 388 Unchecked, 0.4s Time] [2022-03-03 19:46:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51097 states. [2022-03-03 19:46:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51097 to 24128. [2022-03-03 19:46:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24128 states, 24127 states have (on average 4.2235255108384795) internal successors, (101901), 24127 states have internal predecessors, (101901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24128 states to 24128 states and 101901 transitions. [2022-03-03 19:46:01,147 INFO L78 Accepts]: Start accepts. Automaton has 24128 states and 101901 transitions. Word has length 34 [2022-03-03 19:46:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:01,148 INFO L470 AbstractCegarLoop]: Abstraction has 24128 states and 101901 transitions. [2022-03-03 19:46:01,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 24128 states and 101901 transitions. [2022-03-03 19:46:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:46:01,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:01,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:01,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:46:01,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 19:46:01,582 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash 213845226, now seen corresponding path program 34 times [2022-03-03 19:46:01,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:01,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885219134] [2022-03-03 19:46:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:01,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:01,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:01,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885219134] [2022-03-03 19:46:01,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885219134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:01,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453584171] [2022-03-03 19:46:01,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:01,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:01,670 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:01,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:46:01,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:46:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:01,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:46:01,930 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:46:01,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:46:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:01,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:02,034 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:46:02,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 50 [2022-03-03 19:46:02,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:02,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-03-03 19:46:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:02,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453584171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:02,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:02,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:46:02,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321228162] [2022-03-03 19:46:02,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:02,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:46:02,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:46:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:46:02,240 INFO L87 Difference]: Start difference. First operand 24128 states and 101901 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-03-03 19:46:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:02,911 INFO L93 Difference]: Finished difference Result 39901 states and 164589 transitions. [2022-03-03 19:46:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:46:02,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 34 [2022-03-03 19:46:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:03,224 INFO L225 Difference]: With dead ends: 39901 [2022-03-03 19:46:03,224 INFO L226 Difference]: Without dead ends: 39746 [2022-03-03 19:46:03,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:46:03,224 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 476 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:03,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 536 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39746 states. [2022-03-03 19:46:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39746 to 24160. [2022-03-03 19:46:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24160 states, 24159 states have (on average 4.223726147605447) internal successors, (102041), 24159 states have internal predecessors, (102041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24160 states to 24160 states and 102041 transitions. [2022-03-03 19:46:03,977 INFO L78 Accepts]: Start accepts. Automaton has 24160 states and 102041 transitions. Word has length 34 [2022-03-03 19:46:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:03,977 INFO L470 AbstractCegarLoop]: Abstraction has 24160 states and 102041 transitions. [2022-03-03 19:46:03,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-03-03 19:46:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24160 states and 102041 transitions. [2022-03-03 19:46:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:46:04,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:04,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:04,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:04,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:04,233 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 243547430, now seen corresponding path program 35 times [2022-03-03 19:46:04,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:04,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602968652] [2022-03-03 19:46:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:04,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602968652] [2022-03-03 19:46:04,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602968652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:04,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324010350] [2022-03-03 19:46:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:04,311 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:46:04,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:46:04,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:46:04,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:04,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:46:04,566 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:46:04,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:46:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:04,662 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:46:04,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-03-03 19:46:04,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:04,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:46:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324010350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:04,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:04,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:46:04,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2895417] [2022-03-03 19:46:04,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:04,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:46:04,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:46:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:46:04,969 INFO L87 Difference]: Start difference. First operand 24160 states and 102041 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:05,661 INFO L93 Difference]: Finished difference Result 39158 states and 161683 transitions. [2022-03-03 19:46:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:46:05,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 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 34 [2022-03-03 19:46:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:05,803 INFO L225 Difference]: With dead ends: 39158 [2022-03-03 19:46:05,803 INFO L226 Difference]: Without dead ends: 39003 [2022-03-03 19:46:05,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:46:05,804 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 306 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:05,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 796 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:46:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39003 states. [2022-03-03 19:46:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39003 to 24385. [2022-03-03 19:46:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24385 states, 24384 states have (on average 4.22260498687664) internal successors, (102964), 24384 states have internal predecessors, (102964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24385 states to 24385 states and 102964 transitions. [2022-03-03 19:46:06,792 INFO L78 Accepts]: Start accepts. Automaton has 24385 states and 102964 transitions. Word has length 34 [2022-03-03 19:46:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:06,792 INFO L470 AbstractCegarLoop]: Abstraction has 24385 states and 102964 transitions. [2022-03-03 19:46:06,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 24385 states and 102964 transitions. [2022-03-03 19:46:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-03 19:46:06,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:06,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:06,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:07,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:07,048 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash -119249945, now seen corresponding path program 8 times [2022-03-03 19:46:07,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:07,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315774349] [2022-03-03 19:46:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:07,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:07,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315774349] [2022-03-03 19:46:07,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315774349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:07,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151746089] [2022-03-03 19:46:07,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:07,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:07,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:07,110 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:07,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:46:07,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:07,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:46:07,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:07,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:07,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151746089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:07,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:07,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 10 [2022-03-03 19:46:07,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134104572] [2022-03-03 19:46:07,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:07,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:46:07,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:46:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:46:07,263 INFO L87 Difference]: Start difference. First operand 24385 states and 102964 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:07,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:07,757 INFO L93 Difference]: Finished difference Result 39125 states and 163755 transitions. [2022-03-03 19:46:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:46:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 36 [2022-03-03 19:46:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:07,922 INFO L225 Difference]: With dead ends: 39125 [2022-03-03 19:46:07,922 INFO L226 Difference]: Without dead ends: 38193 [2022-03-03 19:46:07,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:46:07,923 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 200 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:07,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 175 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38193 states. [2022-03-03 19:46:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38193 to 33116. [2022-03-03 19:46:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33116 states, 33115 states have (on average 4.218813226634456) internal successors, (139706), 33115 states have internal predecessors, (139706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33116 states to 33116 states and 139706 transitions. [2022-03-03 19:46:08,850 INFO L78 Accepts]: Start accepts. Automaton has 33116 states and 139706 transitions. Word has length 36 [2022-03-03 19:46:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:08,850 INFO L470 AbstractCegarLoop]: Abstraction has 33116 states and 139706 transitions. [2022-03-03 19:46:08,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 33116 states and 139706 transitions. [2022-03-03 19:46:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-03 19:46:08,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:08,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:08,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:09,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 19:46:09,132 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1414841628, now seen corresponding path program 36 times [2022-03-03 19:46:09,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:09,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093346040] [2022-03-03 19:46:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:46:09,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:09,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093346040] [2022-03-03 19:46:09,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093346040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:09,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419925278] [2022-03-03 19:46:09,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:09,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:09,348 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:09,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:46:09,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:09,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:46:09,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:09,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:46:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:46:09,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:46:09,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419925278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:09,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:09,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-03 19:46:09,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451382207] [2022-03-03 19:46:09,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:09,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:46:09,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:46:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:46:09,499 INFO L87 Difference]: Start difference. First operand 33116 states and 139706 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:09,966 INFO L93 Difference]: Finished difference Result 56745 states and 237309 transitions. [2022-03-03 19:46:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:46:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 36 [2022-03-03 19:46:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:10,444 INFO L225 Difference]: With dead ends: 56745 [2022-03-03 19:46:10,445 INFO L226 Difference]: Without dead ends: 56039 [2022-03-03 19:46:10,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:46:10,445 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 116 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:10,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 92 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56039 states. [2022-03-03 19:46:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56039 to 51675. [2022-03-03 19:46:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51675 states, 51674 states have (on average 4.248538917056933) internal successors, (219539), 51674 states have internal predecessors, (219539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51675 states to 51675 states and 219539 transitions. [2022-03-03 19:46:11,933 INFO L78 Accepts]: Start accepts. Automaton has 51675 states and 219539 transitions. Word has length 36 [2022-03-03 19:46:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:11,933 INFO L470 AbstractCegarLoop]: Abstraction has 51675 states and 219539 transitions. [2022-03-03 19:46:11,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51675 states and 219539 transitions. [2022-03-03 19:46:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:46:12,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:12,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:12,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:12,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 19:46:12,270 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1823665086, now seen corresponding path program 37 times [2022-03-03 19:46:12,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:12,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443006725] [2022-03-03 19:46:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:12,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:12,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443006725] [2022-03-03 19:46:12,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443006725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:12,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581588164] [2022-03-03 19:46:12,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:12,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:12,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:12,296 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:12,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:46:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:12,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:12,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581588164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:12,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:12,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 19:46:12,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038903575] [2022-03-03 19:46:12,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:12,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:46:12,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:46:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:46:12,450 INFO L87 Difference]: Start difference. First operand 51675 states and 219539 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:13,122 INFO L93 Difference]: Finished difference Result 55688 states and 233754 transitions. [2022-03-03 19:46:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:46:13,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 37 [2022-03-03 19:46:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:13,346 INFO L225 Difference]: With dead ends: 55688 [2022-03-03 19:46:13,346 INFO L226 Difference]: Without dead ends: 55688 [2022-03-03 19:46:13,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:46:13,347 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 78 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:13,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 123 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55688 states. [2022-03-03 19:46:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55688 to 36065. [2022-03-03 19:46:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36065 states, 36064 states have (on average 4.188664596273292) internal successors, (151060), 36064 states have internal predecessors, (151060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36065 states to 36065 states and 151060 transitions. [2022-03-03 19:46:14,638 INFO L78 Accepts]: Start accepts. Automaton has 36065 states and 151060 transitions. Word has length 37 [2022-03-03 19:46:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:14,638 INFO L470 AbstractCegarLoop]: Abstraction has 36065 states and 151060 transitions. [2022-03-03 19:46:14,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 36065 states and 151060 transitions. [2022-03-03 19:46:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:46:14,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:14,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:14,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:46:14,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 19:46:14,931 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash 903309197, now seen corresponding path program 9 times [2022-03-03 19:46:14,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:14,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767279009] [2022-03-03 19:46:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:15,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:15,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767279009] [2022-03-03 19:46:15,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767279009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:15,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492069193] [2022-03-03 19:46:15,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:15,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:15,037 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:15,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:46:15,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:46:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:46:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:15,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:15,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 96 [2022-03-03 19:46:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:16,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:16,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:16,603 INFO L353 Elim1Store]: treesize reduction 20, result has 78.9 percent of original size [2022-03-03 19:46:16,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 51 treesize of output 99 [2022-03-03 19:46:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:17,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492069193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:17,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:17,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-03-03 19:46:17,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487671650] [2022-03-03 19:46:17,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:17,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:46:17,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:17,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:46:17,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:46:17,110 INFO L87 Difference]: Start difference. First operand 36065 states and 151060 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:18,554 INFO L93 Difference]: Finished difference Result 78788 states and 327008 transitions. [2022-03-03 19:46:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:46:18,554 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:46:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:19,045 INFO L225 Difference]: With dead ends: 78788 [2022-03-03 19:46:19,045 INFO L226 Difference]: Without dead ends: 78616 [2022-03-03 19:46:19,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:46:19,045 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 848 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 636 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:19,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 1828 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 656 Invalid, 0 Unknown, 636 Unchecked, 0.3s Time] [2022-03-03 19:46:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78616 states. [2022-03-03 19:46:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78616 to 46472. [2022-03-03 19:46:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46472 states, 46471 states have (on average 4.215489229842267) internal successors, (195898), 46471 states have internal predecessors, (195898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46472 states to 46472 states and 195898 transitions. [2022-03-03 19:46:20,747 INFO L78 Accepts]: Start accepts. Automaton has 46472 states and 195898 transitions. Word has length 39 [2022-03-03 19:46:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:20,747 INFO L470 AbstractCegarLoop]: Abstraction has 46472 states and 195898 transitions. [2022-03-03 19:46:20,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 46472 states and 195898 transitions. [2022-03-03 19:46:21,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:46:21,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:21,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:21,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:21,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:21,386 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:21,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1645800873, now seen corresponding path program 10 times [2022-03-03 19:46:21,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:21,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357156560] [2022-03-03 19:46:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:21,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:21,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:21,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357156560] [2022-03-03 19:46:21,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357156560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:21,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959947138] [2022-03-03 19:46:21,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:21,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:21,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:21,508 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:21,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:46:21,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:21,925 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-03 19:46:21,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2022-03-03 19:46:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:21,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:22,311 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:46:22,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 52 treesize of output 176 [2022-03-03 19:46:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:23,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959947138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:23,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:23,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-03 19:46:23,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470894489] [2022-03-03 19:46:23,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:23,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:46:23,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:46:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:46:23,365 INFO L87 Difference]: Start difference. First operand 46472 states and 195898 transitions. Second operand has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:25,172 INFO L93 Difference]: Finished difference Result 69332 states and 288328 transitions. [2022-03-03 19:46:25,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:46:25,172 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:46:25,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:25,472 INFO L225 Difference]: With dead ends: 69332 [2022-03-03 19:46:25,472 INFO L226 Difference]: Without dead ends: 68733 [2022-03-03 19:46:25,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:46:25,472 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 518 mSDsluCounter, 3793 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:25,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 2994 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:46:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68733 states. [2022-03-03 19:46:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68733 to 40529. [2022-03-03 19:46:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40529 states, 40528 states have (on average 4.2203414923016185) internal successors, (171042), 40528 states have internal predecessors, (171042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40529 states to 40529 states and 171042 transitions. [2022-03-03 19:46:26,951 INFO L78 Accepts]: Start accepts. Automaton has 40529 states and 171042 transitions. Word has length 39 [2022-03-03 19:46:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:26,951 INFO L470 AbstractCegarLoop]: Abstraction has 40529 states and 171042 transitions. [2022-03-03 19:46:26,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40529 states and 171042 transitions. [2022-03-03 19:46:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:46:27,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:27,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:27,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:27,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 19:46:27,245 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:27,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1417556154, now seen corresponding path program 38 times [2022-03-03 19:46:27,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:27,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711417307] [2022-03-03 19:46:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:27,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:27,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:27,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711417307] [2022-03-03 19:46:27,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711417307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:27,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986197456] [2022-03-03 19:46:27,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:27,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:27,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:27,370 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:27,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:46:27,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:46:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:27,990 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-03 19:46:27,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2022-03-03 19:46:28,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:46:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:28,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:28,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:28,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-03-03 19:46:28,347 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:28,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-03-03 19:46:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:28,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986197456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:28,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:28,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:46:28,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39593215] [2022-03-03 19:46:28,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:28,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:28,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:28,955 INFO L87 Difference]: Start difference. First operand 40529 states and 171042 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:31,475 INFO L93 Difference]: Finished difference Result 108908 states and 445706 transitions. [2022-03-03 19:46:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:46:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:46:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:32,021 INFO L225 Difference]: With dead ends: 108908 [2022-03-03 19:46:32,021 INFO L226 Difference]: Without dead ends: 108498 [2022-03-03 19:46:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:46:32,021 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 325 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 3071 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2654 SdHoareTripleChecker+Invalid, 3101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:32,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 2654 Invalid, 3101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3071 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:46:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108498 states. [2022-03-03 19:46:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108498 to 44055. [2022-03-03 19:46:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44055 states, 44054 states have (on average 4.221455486448449) internal successors, (185972), 44054 states have internal predecessors, (185972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44055 states to 44055 states and 185972 transitions. [2022-03-03 19:46:34,214 INFO L78 Accepts]: Start accepts. Automaton has 44055 states and 185972 transitions. Word has length 39 [2022-03-03 19:46:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:34,214 INFO L470 AbstractCegarLoop]: Abstraction has 44055 states and 185972 transitions. [2022-03-03 19:46:34,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44055 states and 185972 transitions. [2022-03-03 19:46:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:46:34,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:34,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:34,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:34,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:34,521 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:46:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash -598145080, now seen corresponding path program 39 times [2022-03-03 19:46:34,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:34,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971610680] [2022-03-03 19:46:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:34,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:34,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971610680] [2022-03-03 19:46:34,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971610680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:34,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135521544] [2022-03-03 19:46:34,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:34,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:34,641 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:34,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:46:34,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:46:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:34,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:46:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:35,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-03 19:46:35,205 INFO L353 Elim1Store]: treesize reduction 14, result has 77.0 percent of original size [2022-03-03 19:46:35,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 74 [2022-03-03 19:46:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:35,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:35,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:35,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-03-03 19:46:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:36,387 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-03-03 19:46:36,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 42 treesize of output 98 [2022-03-03 19:46:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:36,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135521544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:36,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:36,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-03-03 19:46:36,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462135834] [2022-03-03 19:46:36,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:36,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:46:36,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:46:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:46:36,611 INFO L87 Difference]: Start difference. First operand 44055 states and 185972 transitions. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 29 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)